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Homeostasis: Negative Feedback Control of Blood Pressure.
 
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Install Tubebuddy :) https://www.tubebuddy.com/YTpromotion Thanks for watching :) If you would like to join freedom network, please click on my refferal link! https://www.freedom.tm/via/ytkabix10 Connect me on Linkedin if you'd like www.linkedin.com/in/xkabix
Просмотров: 47124 Kabi
Baroreflex Regulation of Blood Pressure, Animation.
 
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How heart rate is controlled by the parasympathetic and sympathetic divisions of the autonomic nervous system, with overview of baroreceptor resetting. This video (updated with real voice) and other related images/videos (in HD) are available for instant download licensing here : https://www.alilamedicalmedia.com/-/galleries/images-videos-by-medical-specialties/neurology ©Alila Medical Media. All rights reserved. Support us on Patreon and get FREE downloads and other great rewards: patreon.com/AlilaMedicalMedia Baroreflex, or baroreceptor reflex, is one of the mechanisms the body uses to maintain stable blood pressure levels or homeostasis. Baroreflex is a rapid negative feedback loop in which an elevated blood pressure causes heart rate and blood pressure to decrease. Reversely, a decrease in blood pressure leads to an increased heart rate, returning blood pressure to normal levels. The reflex starts with specialized neurons called baroreceptors. These are stretch receptors located in the wall of the aortic arch and carotid sinus. Increased blood pressure stretches the wall of the aorta and carotid arteries causing baroreceptors to fire action potentials at a higher than normal rate. These increased activities are sent via the vagus and glossopharyngeal nerves to the nucleus of the tractus solitarius – the NTS - in the brainstem. In response to increased baroreceptor impulses, the NTS activates the parasympathetic system – the PSNS - and inhibits the sympathetic system – the SNS. As the PSNS and SNS have opposing effects on blood pressures, PSNS activation and SNS inhibition work together in the same direction to maximize blood pressure reduction. Parasympathetic stimulation decreases heart rate by releasing acetylcholine which acts on the pacemaker cells of the SA node. Inhibition of the sympathetic division decreases heart rate, stroke volume and at the same time causes vasodilation of blood vessels. Together, these events rapidly bring DOWN blood pressure levels back to normal. When a person has a sudden drop in blood pressure, for example when standing up, the decreased blood pressure is sensed by baroreceptors as a decrease in tension. Baroreceptors fire at a lower than normal rate and the information is again transmitted to the NTS. The NTS reacts by inhibiting parasympathetic and activating sympathetic activities. The sympathetic system releases norepinephrine which acts on the SA node to increase heart rate; on cardiac myocytes to increase stroke volume and on smooth muscle cells of blood vessels to cause vasoconstriction. Together, these events rapidly bring UP blood pressure levels back to normal. Baroreflex is a short-term response to sudden changes of blood pressure resulted from everyday activities and emotional states. If hypertension or hypotension persists for a long period of time, the baroreceptors will reset to the “new normal” levels. In hypertensive patients for example, baroreflex mechanism is adjusted to a higher “normal” pressure and therefore MAINTAINS hypertension rather than suppresses it. All images/videos by Alila Medical Media are for information purposes ONLY and are NOT intended to replace professional medical advice, diagnosis or treatment. Always seek the advice of a qualified healthcare provider with any questions you may have regarding a medical condition.
Просмотров: 95569 Alila Medical Media
Homeostasis and Negative/Positive Feedback
 
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Explore homeostasis with the Amoeba Sisters and learn how homeostasis relates to feedback in the human body. This video gives examples of negative feedback (temperature and blood glucose regulation) and positive feedback (events in childbirth). Handout available here: http://www.amoebasisters.com/handouts See table of contents below 👇 Table of Contents: Intro to Homeostasis 0:21 Negative Feedback (and how this keeps homeostasis) 1:50 Positive Feedback 4:05 Support us on Patreon! http://www.patreon.com/amoebasisters Our FREE resources: GIFs: http://www.amoebasisters.com/gifs.html Handouts: http://www.amoebasisters.com/handouts.html Comics: http://www.amoebasisters.com/parameciumparlorcomics Connect with us! Website: http://www.AmoebaSisters.com Twitter: http://www.twitter.com/AmoebaSisters Facebook: http://www.facebook.com/AmoebaSisters Tumblr: http://www.amoebasisters.tumblr.com Pinterest: http://www.pinterest.com/AmoebaSister­s Instagram: https://www.instagram.com/amoebasistersofficial/ Visit our Redbubble store at http://www.amoebasisters.com/store.html The Amoeba Sisters videos demystify science with humor and relevance. The videos center on Pinky's certification and experience in teaching science at the high school level. Pinky's teacher certification is in grades 4-8 science and 8-12 composite science (encompassing biology, chemistry, and physics). Amoeba Sisters videos only cover concepts that Pinky is certified to teach, and they focus on her specialty: secondary life science. For more information about The Amoeba Sisters, visit: http://www.amoebasisters.com/about-us.html We cover the basics in biology concepts at the secondary level. If you are looking to discover more about biology and go into depth beyond these basics, our recommended reference is the FREE, peer reviewed, open source OpenStax biology textbook: https://openstax.org/details/books/biology We take pride in our AWESOME community, and we welcome feedback and discussion. However, please remember that this is an education channel. See YouTube's community guidelines https://www.youtube.com/yt/policyandsafety/communityguidelines.html and YouTube's policy center https://support.google.com/youtube/topic/2676378?hl=en&ref_topic=6151248. We also reserve the right to remove comments with vulgar language. Music is this video is listed free to use/no attribution required from the YouTube audio library https://www.youtube.com/audiolibrary/music?feature=blog We have YouTube's community contributed subtitles feature on to allow translations for different languages. YouTube automatically credits the different language contributors below (unless the contributor had opted out of being credited). We are thankful for those that contribute different languages. If you have a concern about community contributed contributions, please contact us.
Просмотров: 246523 Amoeba Sisters
Elements of a Feedback Loop
 
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Paul Andersen defines the major elements of feedback loops. The receptors and effectors both sense and respond to changes in their environment. The following examples are used to illustrate the importance of feedback loops in maintaining homeostasis: speed signs, thermostats, thermoregulation, and blood glucose maintenance. Intro Music Atribution Title: I4dsong_loop_main.wav Artist: CosmicD Link to sound: http://www.freesound.org/people/CosmicD/sounds/72556/ Creative Commons Atribution License
Просмотров: 70604 Bozeman Science
8.8.2 Blood Pressure Regulation
 
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http://braingenie.com/
Просмотров: 61532 braingenie
Renin Angiotensin Aldosterone System
 
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This animation focuses on the renin angiotensin aldosterone system (RAAS), a classic endocrine system that helps to regulate long-term blood pressure and extracellular volume in the body. Many aspects of cardiovascular disease progression can be directly linked to the RAAS system. Mechanisms such as vascular inflammation, generation of reactive oxygen species and alterations of endothelial function are all known to play a role in atherosclerosis.
Просмотров: 778084 Mechanisms in Medicine
Feedback Loops
 
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Feedback loops are of critical importance to the regulation of a stable internal environment in our bodies. Here, find an explanation of different types of feedback loops and examples of each.
Просмотров: 43449 Johnny Clore
Homeostatic Control Systems - Homeostatic Control Mechanisms and Feedback Control Loops
 
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In this video we discuss what are homeostatic control systems and how they work. We cover feedback loops and how they work to help maintain homeostasis. Homeostatic control mechanisms or systems In order to maintain homeostasis cells must be in an environment that allows them to function properly with changing external conditions. Almost all of the organs and systems in the body must work to maintain homeostasis. If the body needs to change the internal environment it does so through what is called homeostatic control mechanisms. For instance, when you go for a run, your body needs more oxygen, and your body produces more carbon dioxide. So, the internal environment must adapt to the changing needs. During your run, your breathing will increase, bringing more oxygen in and eliminating the increased production of carbon dioxide, your heart beat and stroke volume will increase, thus increasing the amount of nutrient rich blood being sent throughout your body. This process of the body adjusting to a change is called a feedback control loop or feedback control system. These control loops transmit information in mainly 2 ways, through nervous impulses or by chemical messengers called hormones. Weather the nervous impulses or hormones are transmitting the information, the feedback control loops work in the same way and have the same basic components. The feedback control loops consist of 4 main components. A sensor mechanism, an integrator or control center, an effector mechanism and feedback. Hormone producing glands and sensory nerve cells can act as homeostatic sensors. If something changes outside of the normal set point range for homeostasis, a sensor transmits a signal to the next component of the feedback loop, the integrator. The integrator is the control center of the feedback loop and many times it is in an area of the brain. It gets this signal or variable and analyzes it and checks it with other signals or variables it has received from other sensors. It checks the value of the variables it has received against the normal set point range for those variables. If the integrator determines these variables are outside of the normal set point range, then, some type of action is needed. If action is necessary, the integrator sends a signal to the third component of the feedback control loop, the effector mechanism. Effectors are organs, like glands or muscles, which provide the response that the integrator, or control center desires. The goal of the effectors is to influence or change the values of the variables. This can be positive or negative changes to the variables, such as increasing or decreasing heart rate, or altering the concentration of glucose in the blood stream. Glucose being the main source of fuel for cells. As these effectors make changes, the variables attain new values, and this is sent back through the feedback control loop. For instance, if you are walking, then you start jogging, effectors will increase your heart rate, based on the mechanisms of the feedback control loop. Many sources use a diagram of a furnace controlled by a thermostat to explain this process more clearly. Here we have a house, and here we have a person. Let’s say that in both situations a stimulus happens, that being a cold front blows in, causing a decrease in temperature. The house has a thermometer, which is its sensor, and the person has temperature receptors in the skin, which are the sensor mechanism for the body. The thermometer sends the information that the temperature or variable has decreased, through wires to its integrator, the thermostat. The temperature receptors in the skin send the variable change through nerve fibers to the brain, or the integrator for the body in this situation. The integrators, or control centers for both the body and house, check the value of the newly received variables against the set point range that each of them has allowed for this type of variable. Since this temperature variable change does not lie in the set point range, the integrators send a signal to effectors to do something to get these variables within this set point range. In the case of the house the thermostat sends a message through wires to the furnace to crank the heat up. In the body, the brain sends a message through nerve fibers to the muscles to start shivering to generate some heat. In both the house and the body of the person, the heat that is generated brings them both to a state of homeostasis. Once homeostasis is reached, both sensor mechanisms, the thermometer and temperature receptors in the skin are sending new variable values, or feedback to their integrators that lie within the set point ranges. One note, homeostatic control systems can be based on positive or negative feedback.
Просмотров: 2578 Whats Up Dude
Positive and Negative Feedback Loops
 
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018 - Positive and Negative Feedback Loops Paul Andersen explains how feedback loops allow living organisms to maintain homeostasis. He uses thermoregulation in mammals to explain how a negative feedback loop functions. He uses fruit ripening to explain how a positive feedback loop functions. He also explains what can happen when a feedback look is altered. Diabetes mellitus is caused by an alteration in the blood glucose feedback loop. Do you speak another language? Help me translate my videos: http://www.bozemanscience.com/translations/ All of the images are licensed under creative commons and public domain licensing: Apple, n.d. http://openclipart.org/detail/137929/apple-by-jgm104. Boy, n.d. http://openclipart.org/detail/127915/boy-by-3dline. Burger. Summer Pond on Dubenka River near Borovkovo, June 15, 2005. Own work. http://commons.wikimedia.org/wiki/File:Dubenka_pond.jpg. Carroll, Timothy J. Signs On Columns, March 5, 2007. http://www.flickr.com/photos/tjc/411967882/. en.wikipedia, Original uploader was Prisonblues at. English: Mechanism of Glucose Dependent Insulin Release, August 16, 2004. Transferred from en.wikipedia; transferred to Commons by User:Leptictidium using CommonsHelper. http://commons.wikimedia.org/wiki/File:Glucose-insulin-release.png. File:Diabetes Signs symptoms17.jpg, n.d. http://wikieducator.org/File:Diabetes_signs_symptoms17.jpg. "File:Diabetes World Map - 2000.svg." Wikipedia, the Free Encyclopedia. Accessed November 14, 2013. http://en.wikipedia.org/wiki/File:Diabetes_world_map_-_2000.svg. "File:Duodenumandpancreas.jpg." Wikipedia, the Free Encyclopedia. Accessed November 14, 2013. http://en.wikipedia.org/wiki/File:Duodenumandpancreas.jpg. "File:Ethylene-3D-vdW.png." Wikipedia, the Free Encyclopedia. Accessed November 14, 2013. http://en.wikipedia.org/wiki/File:Ethylene-3D-vdW.png. "File:Paramecium.jpg." Wikipedia, the Free Encyclopedia. Accessed November 15, 2013. http://en.wikipedia.org/wiki/File:Paramecium.jpg. "File:Sphinx2 July 2006.jpg." Wikipedia, the Free Encyclopedia. Accessed November 14, 2013. http://en.wikipedia.org/wiki/File:Sphinx2_July_2006.jpg. "File:Wiki Snake Eats Mouse.jpg." Wikipedia, the Free Encyclopedia. Accessed November 14, 2013. http://en.wikipedia.org/wiki/File:Wiki_snake_eats_mouse.jpg. Simple Tree, n.d. http://openclipart.org/detail/104527/simple-tree-by-rg1024. Intro Music Atribution Title: I4dsong_loop_main.wav Artist: CosmicD Link to sound: http://www.freesound.org/people/CosmicD/sounds/72556/ Creative Commons Atribution License
Просмотров: 681696 Bozeman Science
Endocrine System Negative Feedback
 
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How are the levels of glucose in the blood maintained?
Просмотров: 14870 Tim Barlow
Human Physiology - Long Term Regulation of Mean Arterial Pressure
 
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“Human Physiology” is a free online course on Janux that is open to anyone. Learn more at http://janux.ou.edu. Created by the University of Oklahoma, Janux is an interactive learning community that gives learners direct connections to courses, education resources, faculty, and each other. Janux courses are freely available or may be taken for college credit by enrolled OU students. Dr. Heather R. Ketchum is an Associate Professor of Biology. Video produced by NextThought (http://nextthought.com). Copyright © 2000-2014 The Board of Regents of the University of Oklahoma, All Rights Reserved.
Просмотров: 9509 Janux
GCSE Science Revision - Homeostasis - How your Kidneys Control Water content in Humans
 
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In this short video, you will learn how the amount of water in your blood is controlled by the kidneys. For example, what happens when you are dehydrated? How does your urine change?
Просмотров: 208589 JamJarMMX
ADH in the Human Body
 
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Antidiuretic hormone's function in the body explained.
Просмотров: 2077 Colette Fritsche
Blood Pressure and Isotonic Fluid
 
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A short video to describe how the body maintains homeostasis of blood pressure and isotonic fluid. Causes, effects, and the body's methods to correct hypervolemia and hypovolemia are discussed. A copy of this diagram can be obtained at http://www.kirkwood.edu/pdf/uploaded/695/bp_isotonic_fluid_homeostasisyt.pdf
Просмотров: 7287 D.J. Hennager
Human Anatomy and Physiology: Homeostasis
 
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An overview of a very important concept in Human Anatomy: Homeostasis. This video also introduces negative and positive feedback mechanisms.
Просмотров: 47662 Prof Camenares
Homeostasis : Negative Feedback Control of Temperature.
 
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Install Tubebuddy :) https://www.tubebuddy.com/YTpromotion Thanks for watching :) If you would like to join freedom network, please click on my refferal link! https://www.freedom.tm/via/ytkabix10 Connect me on Linkedin if you'd like www.linkedin.com/in/xkabix
Просмотров: 15001 Kabi
Renin-Angiotensin-Aldosterone System
 
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http://www.handwrittentutorials.com - This tutorial explores the Renin-Angiotensin-Aldosterone System, its role in Blood Pressure, the enzymes, involved, and how drugs act upon the system. For more entirely FREE medical tutorials visit http://www.handwrittentutorials.com
Просмотров: 474882 Handwritten Tutorials
Great Glands - Your Endocrine System: CrashCourse Biology #33
 
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Hank fills us in on the endocrine system - the system of glands which produce and secrete different types of hormones directly into the bloodstream to regulate the body's growth, metabolism, and sexual development & function. Like CrashCourse on Facebook: http://www.facebook.com/YouTubeCrashCourse Follow CrashCourse on Twitter: http://www.twitter.com/TheCrashCourse References for this episode can be found in the Google document here: http://dft.ba/-1lsU Table of Contents 1) Signalling Systems 2:07:0 2) Pituitary 3:19:1 3) Hypothalamus 4:17:1 4) Thyroid 4:52:1 5) Adrenal 5:38:1 6) Pancreas 6:51:1 7) Biolography 8:49:2 biology, crash course, crashcourse, hank green, anatomy, physiology, endocrine system, hormone, gland, human, body, science, exocrine, pituitary, thyroid, adrenal, pancreas, gonads, paracrine signalling, autocrine signalling, signal receptor, steroids, peptides, monoamines, brain, hypothalamus, oxytocin, negative feedback loop, kidney, stress, ACTH, epinephrine, organ, glucose, insulin, glucagon, testes, androgen, testosterone, ovaries, estrogen, progestin, estradiol, progesterone, sex, alfred jost, embryologist, secretion, embryonic development, embryo, mammal, fetal development, puberty, reproductive organs Support CrashCourse on Subbable: http://subbable.com/crashcourse
Просмотров: 1314035 CrashCourse
Highway Report User Feedback
 
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Pengguna Highway report menjelaskan apa yang mereka rasakan ketika menggunakan highway report.
Просмотров: 78 Noob Team
Negative feedback mechanism
 
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negative feedback mechanism
Просмотров: 123 Physiology
GLOMERULAR FILTRATION made easy!!
 
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A step-by-step tutorial about glomerular filtration. Includes an overview of glomerular filtration rate (GFR), discussing how Starling forces (hydrostatic and oncotic pressure) lead to filtration being favoured. FUNCTION OF THE NEPHRON made easy!! https://www.youtube.com/watch?v=8UVlXX-9x7Q Subscribe: https://www.youtube.com/channel/UCC_8OQncpInqJPFKqyzjW_A Like ^_^ facebook page: https://www.facebook.com/biomedsessions 0:47 Ultrafiltration Barrier 2:36 Starling Forces (hydrostatic & oncotic pressure) 4:41 Glomerular Filtration Rate (GFR)
Просмотров: 300969 Biomed Sessions
Negative Feedback Loops
 
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A short description of how negative feedback loops help the body maintain homeostasis.
Просмотров: 20584 ProfessorBrownETSU
Optical Heart Pulse Detector
 
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A while back I downloaded an app for my phone that can measure your pulse using the camera and LED on the phone (called Instant Heart Rate). I thought this was quite neat, looked up how it worked and discovered the topic of pulse oximetry. There is a difference in the absorption of red (and infra-red) light between oxygenated and de-oxygenated haemoglobin in your blood, and by amplifying this difference you can effectively obtain your pulse. So I thought I'd have a go doing it the hard way using low-level analogue electronics rather than a camera and software. The circuit comprises a super-bright 620nm red LED that emits light into your finger, some of which is absorbed and some reflected back into an adjacent silicon photodiode (SFH 229). The resulting photocurrent is converted into a voltage using a transimpedance amplifier with a gain of 100,000 (yeah, it's a very weak signal!). This signal is then passed through a second order active low-pass filter with a 2.2Hz corner frequency to get the short-term average. The signal is then passed through a differential amplifier (INA128P), relative to its average, and amplified by a factor of 501. So I now have a signal showing me the fluctuations in red light absorption of my blood amplified by a factor of 50.1 million! This signal then goes through another second-order active low pass filter with a 5.6Hz corner frequency to get rid of any high frequency noise and, in particular, 50Hz oscillations from mains fluorescent lighting(!) while not eating too much into the desired signal, which, for a typical human should be no greater than 2.5Hz. Finally, in order to get the flashing red pulse light and beep, the signal is passed through a threshold circuit (op-amp in open loop mode) which switches a transistor for the LED and piezo-buzzer power. Since the signal is symmetric, a pseudo-ground had to be used to allow for 'negative' fluctuations. Next, I want to get the BPM readout onto a 7-sement LED display WITHOUT using PIC chips or software. All low level. It's harder to do and therefore more fun and rewarding (when it finally works, which is never the case first time! :-) )
Просмотров: 10807 Paul Nathan
Baroreceptors mnemonic
 
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Information I cover in this video: - Signals from the carotid baroreceptors are sent via the glossopharyngeal nerve (cranial nerve IX) - Signals from the aortic baroreceptors travel through the vagus nerve (cranial nerve X) - Hypotension and hypertension is sensed by which baroreceptors - How to remember them! Stay awesome.
Просмотров: 10509 Medicowesome
What Kind Of Feedback Is Blood Clotting?
 
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Release of chemical mediators to regulate blood clotting. Introduction to anatomy and physiology a blog around the clockblood flashcards. Like any positive feedback mechanism, it is not self regulating, but has the advantage of being quite speedy. Eventually, the wound would randomly encounter enough clots to heal. Other negative feedback loops regulate blood sugar concentration, water balance, ph, and countless other variables. Homeostasis will not be achieved, unless blood clotting occurs. The platelets continue to pile up and release chemicals until a clot is formed. That is, it has aug 6, 2016 figure 3 the contractions experienced in childbirth come about as a result of positive feedback loopwhen tissue is torn or injured, chemical released. Blood clotting happens once the sensory for it has been triggered and brain sends information to start blood. Homeostasis positive negative feedback mechanisms anatomy physiology why do we consider blood clotting as a feedback? . For now, let's list some other notable positive feedback loops in humans. Key words blood coagulation positive feedback threshold protease inhibitor. An injury diabetes is related to blood glucose levels, because of the high amount os that can be found in individuals with diabeted, therefore set point highly saturated vesseles. Damage to the blood vessel wall releases chemicals that begin process of clotting. Thrombin results in plug formation by activating fibrin from fibrinogen. In his proposal of clotting pathways as a cascade system. Unless blood clots are abnormal (usually interior jul 6, 2017. Blood clotting injury or vessel damage promotes mechanisms that enforce homeostasis to stop the bleeding. Once these platelets have activated, they release a chemical if this was negative feedback loop, then all the components of cascade would exist in bloodstream some weird inefficient homeostasis. Positive feedback blood clotting youtube. For example, during blood clotting, a cascade of enzymatic proteins activates each other, leading to the formation fibrin clot that prevents loss. The plug so formed stops the bleeding from injured tissue examples of positive feedbackwhen a part body is injured, it releases chemicals that activate blood platelets. First, the blood clotting mechanism is a cascade of biochemical reactions that operates acording to this principle. That is, it has positive and negative feedback loops in biology albert. One common example of a positive feedback system in living things is blood clotting 2005;25 2463 2469. This chemical causes platelets in the blood to activate. Macfarlane1 together may lead to another type of control activation thresholdsin positive feedback, a later enzyme in the clotting cascade there are two different types feedback loops and negative, is also negative inhibition. Because of its ability to generate an amplifying process, beneficial positive feedback is often seen where a rapid response needed. Many such part of the complex biochemical
Просмотров: 103 Evette Freudenburg Tipz
Interstitial Fluid
 
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Paul Andersen explains the importance and location of interstitial fluid. He describes both the hydrostatic and osmotic pressures that move fluid between the interstitial fluid and the capillary. He also explains the major function of the fluid for the movement of material into and out of the cell. Intro Music Atribution Title: I4dsong_loop_main.wav Artist: CosmicD Link to sound: http://www.freesound.org/people/CosmicD/sounds/72556/ Creative Commons Atribution License
Просмотров: 323994 Bozeman Science
Osmoregulation
 
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Paul Andersen explains how organisms regulate their internal osmolarity or not. He starts with a brief description of osmosis and why it is important for animal cell to be surrounded by an isotonic solution. He then explains how freshwater and saltwater fish osmoregulate. He finally discussed the nephron within the kidney as an osmoregulatory organ. He explains how the loop of Henle sets up a gradient which is used to reclaim or remove water with the use of the antidiuretic hormone (or ADH). Intro Music Atribution Title: I4dsong_loop_main.wav Artist: CosmicD Link to sound: http://www.freesound.org/people/CosmicD/sounds/72556/ Creative Commons Atribution License
Просмотров: 238462 Bozeman Science
Human Physiology - Short Term Regulation of Mean Arterial Pressure
 
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“Human Physiology” is a free online course on Janux that is open to anyone. Learn more at http://janux.ou.edu. Created by the University of Oklahoma, Janux is an interactive learning community that gives learners direct connections to courses, education resources, faculty, and each other. Janux courses are freely available or may be taken for college credit by enrolled OU students. Dr. Heather R. Ketchum is an Associate Professor of Biology. Video produced by NextThought (http://nextthought.com). Copyright © 2000-2014 The Board of Regents of the University of Oklahoma, All Rights Reserved.
Просмотров: 4860 Janux
ADH secretion | Renal system physiology | NCLEX-RN | Khan Academy
 
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Learn the key triggers for ADH secretion. Rishi is a pediatric infectious disease physician and works at Khan Academy. Created by Rishi Desai. Watch the next lesson: https://www.khanacademy.org/test-prep/nclex-rn/rn-renal-system/rn-renal-regulation-of-blood/v/adh-effects-on-blood-pressure?utm_source=YT&utm_medium=Desc&utm_campaign=Nclex-rn Missed the previous lesson? https://www.khanacademy.org/test-prep/nclex-rn/rn-renal-system/rn-renal-regulation-of-blood/v/aldosterone-removes-acid-from-the-blood?utm_source=YT&utm_medium=Desc&utm_campaign=Nclex-rn NCLEX-RN on Khan Academy: A collection of questions from content covered on the NCLEX-RN. These questions are available under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License (available at http://creativecommons.org/licenses/by-nc-sa/3.0/us/). About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s NCLEX-RN channel: https://www.youtube.com/channel/UCDx5cTeADCvKWgF9x_Qjz3g?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Просмотров: 299941 khanacademymedicine
The hypothalamus and pituitary gland | Endocrine system physiology | NCLEX-RN | Khan Academy
 
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What makes the endocrine organs tick? Find out in this video about the hypothalamus and pituitary glands! Created by Ryan Scott Patton. Watch the next lesson: https://www.khanacademy.org/test-prep/nclex-rn/rn-endocrine-system/rn-the-endocrine-system/v/hormone-concentration-metabolism-negative-feedback?utm_source=YT&utm_medium=Desc&utm_campaign=Nclex-rn Missed the previous lesson? https://www.khanacademy.org/test-prep/nclex-rn/rn-endocrine-system/rn-the-endocrine-system/v/endocrine-gland-hormone-review?utm_source=YT&utm_medium=Desc&utm_campaign=Nclex-rn NCLEX-RN on Khan Academy: A collection of questions from content covered on the NCLEX-RN. These questions are available under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License (available at http://creativecommons.org/licenses/by-nc-sa/3.0/us/). About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s NCLEX-RN channel: https://www.youtube.com/channel/UCDx5cTeADCvKWgF9x_Qjz3g?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Просмотров: 594126 khanacademymedicine
What Is Long Loop Negative Feedback?
 
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Predict changes in the secretory rates of hypothalamic, anterior pituitary and target gland hormones caused by over secretion or under any these receptor deficit for. Your body does not often employ positive feedback because it doesn't like extreme conditions. For example, insulin like growth factor 1 (igf 1) is stimulated to be released by gh what the difference between short loop and long negative feedback? The increase or decrease secretion of anterior pituitary hormone enough return hypothalamus back normal (short loop). Which of the following tropic hormones is also known as catecholamine, dopamine? Prolactin inhibiting hormone. If an anterior pituitary hormone exerts a negative feedback effect on the hypothalamus, it is called short loopnegative. Googleusercontent search. S chapter 5 feedback control in endocrine systems negative loop. Three levels of feedback mechanisms controlling hormone synthesis can be identified long loop, short and ultrashort loop. Stimulation of dopamine release by prolactininhibition growth hormone releasing (ghrh) (gh)inhibition insulin like factor 1inhibition corticotropin adrenocorticotropic dec 19, 2011 long loop feedback one the most clinically obvious and simplest forms negative control in endocrine systems involves suppression secretion a trophic (or hormone) it stimulates. Long loop feedback refers to the hormone that was released from peripheral endocrine glands inhibiting pituitary and or hypothalamic secretion of releasing hormones. Eduhypothalamus and pituitary gland. Erin glatter mar 27, 2015 don't let these names fool you though negative feedback is a very good thing when it comes to homeostasis. Most of us don't have hypo hyperthyroidism, because it's under a homeostatic reflex. What does long feedback loop mean? Feedback loops are used extensively to regulate secretion of hormones in the hypothalamic pituitary axis. An important example of a negative feedback loop is seen in control thyroid hormone secretion. The increasing circulating levels of that hormone then diagram the short loop and long negative feedback control anterior pituitary secretion. Start studying long loop negative feedback. Therefore, since negative feedback maintains appropriate conditions in your body, it's the most looking for online definition of long loop medical dictionary? Long explanation free. Which of the following is a correct example short loop negative feedback? . As the thyrotropin stimulates thyroid to release more thyroxin, levels of thyroxin go up in bloodstream and that is going inhibit further tsh from cells adenohypophysis hypothalamic control pituitary hormone (section 4, chapter 2 negative feedback regulation long loop loops endocrine system video & lesson medical dictionary free. Learn vocabulary, terms, and more with flashcards, games, other study tools may 16, 2005 if the last hormone in a chain of control can exert negative feedback on hypophysio pituitary system, it is called long loop. As the thyrotropi
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Endocrine System, part 1 - Glands & Hormones: Crash Course A&P #23
 
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Hank begins teaching you about your endocrine system by explaining how it uses glands to produce hormones. These hormones are either amino-acid based and water soluble, or steroidal and lipid-soluble, and may target many types of cells or just turn on specific ones. He will also touch on hormone cascades, and how the HPA axis effects your stress response. Table of Contents Endocrine System 2:32 Glands Produce Hormones 2:58 Amino Acid Based and Water Soluble 4:18 Steroidal and Lipid Soluble 4:44 Hormone Cascades 6:15 HPA Axis Effects Your Stress Response 6:30 *** Crash Course Psychology Poster: http://www.dftba.com/crashcourse *** Crash Course is now on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: Mark Brouwer, Jan Schmid, Steve Marshall, Anna-Ester Volozh, Sandra Aft, Brad Wardell, Christian Ludvigsen, Robert Kunz, Jason, A Saslow, Jacob Ash, Jeffrey Thompson, Jessica Simmons, James Craver, Simun Niclasen, SR Foxley, Roger C. Rocha, Nevin, Spoljaric, Eric Knight, Elliot Beter, Jessica Wode ***SUBBABLE MESSAGES*** TO: Laura Hewett FROM: Amy Paez Greetings from the other side of the world! DFTBA -- TO: Wesley FROM: G Distance is created by the Desert Otherworld, therefore we shall not be destroyed. ***SUPPORTER THANK YOU!*** Thank you so much to all of our awesome supporters for their contributions to help make Crash Course possible and freely available for everyone forever: Mickey Maloney, Dan Smalley, Stephen DeCubellis, Vanessa Benavent, Andrew Galante, LankySam!, David Costello, Vanessa Benavent, Kenzo Yasuda, Tessa White -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
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kidney structure and nephron function in filtration in urine formation
 
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Structure And Function Of Kidney And Nephron In Hindi | Vinay Rajput csir net life science lectures . In this lecture we discuss about the Structure And Function Of Kidney and Structure And Function Of nephron . The kidneys are two bean-shaped organs found on the left and right sides of the body in vertebrates. They filter the blood in order to make urine, to release and retain water, and to remove waste and nitrogen (the excretory system).The kidneys regulate the balance of ions known as electrolytes in the blood, along with maintaining acid base homeostasis. They also move waste products out of the blood and into the urine, such as nitrogen-containing urea and ammonium. Kidneys also regulate fluid balance and blood pressure. They are also responsible for the reabsorption of water, glucose, and amino acids. The kidneys also produce hormones including calcitriol and erythropoietin. The kidneys also make an important enzyme, renin, which affects blood pressure through negative feedback. n humans, the kidneys are located high in the abdominal cavity, one on each side of the spine, and lie in a retroperitoneal position at a slightly oblique angle. The kidney has a bean-shaped structure with a convex and a concave border. A recessed area on the concave border is the renal hilum, where the renal artery enters the kidney and the renal vein and ureter leave. Renal histology studies the microscopic structure of the kidney. Distinct cell types include: Kidney glomerulus parietal cell Kidney glomerulus podocyte Kidney proximal tubule brush border cell Loop of Henle thin segment cell Thick ascending limb cell Kidney distal tubule cell Collecting duct principal cell Collecting duct intercalated cell Interstitial kidney cells Early proximal tubule Thin descending loop of Henle Thick ascending loop of Henle Early distal convoluted tubule Collecting tubules The nephron is the basic structural and functional unit of the kidney. Its chief function is to regulate the concentration of water and soluble substances like sodium salts by filtering the blood, reabsorbing what is needed and excreting the rest as urine. A nephron eliminates wastes from the body, regulates blood volume and blood pressure, controls levels of electrolytes and metabolites, and regulates blood pH. Its functions are vital to life and are regulated by the endocrine system by hormones such as antidiuretic hormone, aldosterone, and parathyroid hormone. In humans, a normal kidney contains 800,000 to 1.5 million nephrons. Urine Formation Process In Kidney and Nephron Filtration | Renal Physiology | vinay rajput. part -2 = link - https://youtu.be/o7UGoAySIrw The Glomerular Capsule Glomerulus Filtration Barriers Podocytes Filtration in the Kidney | Nephron | vinay rajput. part - 3 = link - https://youtu.be/NmcTpHBh4aw kidney structure kidney anatomy vinay rajput tutorial nephron function urine formation filtration urinary system -~-~~-~~~-~~-~- Please watch: "Cellular respiration - Krebs cycle | TCA cycle | Citric acid cycle trick in hindi" https://www.youtube.com/watch?v=_61NxPKjQwo -~-~~-~~~-~~-~-
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Your Brain on Stress and Anxiety
 
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Stress is the way our bodies and minds react to something which upsets our normal balance in life. Stress is how we feel and how our bodies react when we are fearful or anxious. Some level of stress has some upside to mind and body function to enable us to react in a positive way. Too much stress though, is both harmful to the body and our performance. How much is too much? Well, that depends... on you and how you respond. It is essential to know how our brain responds to the stimuli which trigger an anxiety response so that you are equipped to deal appropriately with anxiety. (Learn four simple brain hacks to overcome performance anxiety: https://youtu.be/FlgGLs1Cpcw) Let me highlight the key areas of your brain that are involved, and then I will explain what happens inside the brain. The Thalamus is the central hub for sights and sounds. The thalamus breaks down incoming visual cues by size, shape and colour, and auditory cues by volume and dissonance, and then signals the cortex. The cortex then gives raw sights and sounds meaning enabling you to be conscious of what you are seeing and hearing. And I'll mention here that the prefrontal cortex is vital to turning off the anxiety response once the threat has passed. The amygdala is the emotional core of the brain whose primary role is to trigger the fear response. Information passing through the amygdala is associated with an emotional significance. The bed nucleus of the stria terminals is particularly interesting when we discuss anxiety. While the amygdala sets off an immediate burst of fear whilst the BNST perpetuates the fear response, causing longer term unease typical of anxiety. The locus ceruleus receives signals from the amygdala and initiates the classic anxiety response: rapid heartbeat, increased blood pressure, sweating and pupil dilation. The hippocampus is your memory centre storing raw information from the senses, along with emotional baggage attached to the data by the amygdala. Now we know these key parts, what happens when we are anxious, stressed or fearful? Anxiety, stress and, of course, fear are triggered primarily through your senses: Sight and sound are first processed by the thalamus, filtering incoming cues and sent directly to the amygdala or the cortex. Smells and touch go directly to the amygdala, bypassing the thalamus altogether. (This is why smells often evoke powerful memories or feelings). Any cues from your incoming senses that are associated with a threat in the amygdala (real or not, current or not) are immediately processed to trigger the fear response. This is the expressway. It happens before you consciously feel the fear. The hippothalmus and pituitary gland cause the adrenal glands to pump out high levels of the stress hormone coritsol. Too much short circuits the cells of the hippocampus making it difficult to organize the memory of a trauma or stressful experience. Memories lose context and become fragmented. The body's sympathetic nervous system shifts into overdrive causing the heart to beat faster, blood pressure to rise and the lungs hyperventilate. Perspiration increases and the skin's nerve endings tingle, causing goosebumps. Your senses become hyper-alert, freezing you momentarily as you drink in every detail. Adrenaline floods to the muscles preparing you to fight or run away. The brain shifts focus away from digestion to focus on potential dangers. Sometimes causing evacuation of the digestive tract thorough urination, defecation or vomiting. Heck, if you are about to be eaten as someone else's dinner why bother digesting your own? Only after the fear response has been activated does the conscious mind kick in. Some sensory information, takes a more thoughtful route from the thalamus to the cortex. The cortex decides whether the sensory information warrants a fear response. If the fear is a genuine threat in space and time, the cortex signals the amygdala to continue being on alert. Fear is a good, useful response essential to survival. However, anxiety is a fear of something that cannot be located in space and time. Most often it is that indefinable something triggered initially by something real that you sense, that in itself is not threatening but it is associated with a fearful memory. And the bed nucleus of the stria terminals perpetuate the fear response. Anxiety is a real fear response for the individual feeling anxious. Anxiety can be debilitating for the sufferer. Now that you know how anxiety happens in your brain, we can pay attention to how we can deliberately use our pre-frontal cortex to turn off an inappropriate anxiety response once a threat has passed. Background Music: My Elegant Redemption by Tim McMorris. http://audiojungle.net/item/my-elegant-redemption/5445374 Find out how we can help, http://www.LeadershipAdvantEdge.com
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Human Body Systems Functions Overview: The 11 Champions (Updated)
 
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This is the updated Amoeba Sisters human organ systems video, which provides a brief function introduction to each of the 11 human organ systems. Expand details for table of contents.👇 Video has handout: http://www.amoebasisters.com/handouts Note: This overview provides the name of each organ system and overall body system functions. This can support further discussion on how these functions work together. While structure detail is not included in this brief overview, this can provide a foundation for further exploration of body system structures. Table of Contents: Levels of Organization 0:49 Circulatory 1:39 Digestive 2:40 Endocrine 3:16 Excretory 3:42 Integumentary 4:21 Lymphatic/immune 4:39 Muscular 5:25 Nervous 5:41 Reproductive 6:13 Respiratory 6:27 Skeletal systems 6:49 Importance of Systems Working Together 7:20 Support us on Patreon! http://www.patreon.com/amoebasisters Our FREE resources: GIFs: http://www.amoebasisters.com/gifs.html Handouts: http://www.amoebasisters.com/handouts.html Comics: http://www.amoebasisters.com/parameciumparlorcomics Connect with us! Website: http://www.AmoebaSisters.com Twitter: http://www.twitter.com/AmoebaSisters Facebook: http://www.facebook.com/AmoebaSisters Tumblr: http://www.amoebasisters.tumblr.com Pinterest: http://www.pinterest.com/AmoebaSister­s Instagram: https://www.instagram.com/amoebasistersofficial/ Visit our Redbubble store at http://www.amoebasisters.com/store.html The Amoeba Sisters videos demystify science with humor and relevance. The videos center on Pinky's certification and experience in teaching science at the high school level. Pinky's teacher certification is in grades 4-8 science and 8-12 composite science (encompassing biology, chemistry, and physics). Amoeba Sisters videos only cover concepts that Pinky is certified to teach, and they focus on her specialty: secondary life science. For more information about The Amoeba Sisters, visit: http://www.amoebasisters.com/about-us.html We cover the basics in biology concepts at the secondary level. If you are looking to discover more about biology and go into depth beyond these basics, our recommended reference is the FREE, peer reviewed, open source OpenStax biology textbook: https://openstax.org/details/books/biology We take pride in our AWESOME community, and we welcome feedback and discussion. However, please remember that this is an education channel. See YouTube's community guidelines https://www.youtube.com/yt/policyandsafety/communityguidelines.html and YouTube's policy center https://support.google.com/youtube/topic/2676378?hl=en&ref_topic=6151248. We also reserve the right to remove comments with vulgar language. Music is this video is listed free to use/no attribution required from the YouTube audio library https://www.youtube.com/audiolibrary/music?feature=blog We have YouTube's community contributed subtitles feature on to allow translations for different languages. YouTube automatically credits the different language contributors below (unless the contributor had opted out of being credited). We are thankful for those that contribute different languages. If you have a concern about community contributed contributions, please contact us.
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What Is A Differential Amplifier?
 
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https://goo.gl/6U6t22 - Subscribe For more Videos ! For more Health Tips | Like | Comment | Share: Thank you for watching Our videos: ▷ CONNECT with us!! #Health Diaries ► YOUTUBE - https://goo.gl/6U6t22 ► Facebook - https://goo.gl/uTP7zG ► Twitter - https://twitter.com/JuliyaLucy ► G+ Community - https://goo.gl/AfUDpR ► Google + - https://goo.gl/3rcniv ► Blogger - https://juliyalucy.blogspot.in/ Watch for more Health Videos: ► Diabetes and High blood pressure - How are they related?: https://goo.gl/zQCSpH ► Period Hacks || How To Stop Your Periods Early: https://goo.gl/dSmFgi ► Cold and Flu Home Remedies: https://goo.gl/biPp8b ► Homemade Facial Packs: https://goo.gl/NwV5zj ► How To Lose Belly Fat In 7 Days: https://goo.gl/EHN879 ► Powerfull Foods for Control #Diabetes: https://goo.gl/9SdaLY ► Natural Hand Care Tips At Home That Work: https://goo.gl/YF3Exa ► How to Tighten #SaggingBreast: https://goo.gl/ENnb6b ► Natural Face Pack For Instant Glowing Skin: https://goo.gl/gvd5mM ► Get Rid of Stretch Marks Fast & Permanently: https://goo.gl/ZVYvQZ ► Eating Bananas with Black Spots: https://goo.gl/gXuri6 ► Drink this Juice every day to Cure #Thyroid in 3 Days: https://goo.gl/L3537H ► How Garlic Improves Sexual Stamina? https://goo.gl/GNcbYU ► Benefits of using Egg Shells: https://goo.gl/hAUyUS ► Home Remedies to Gain Weight Fast: https://goo.gl/jBVVQh ► Amazing Benefits of Olive Oil for Health: https://goo.gl/R3583v ► Rapid Relief of Chest Pain (Angina): https://goo.gl/idAFZR ► Home Remedies for Joint & Arthritis Pains Relief: https://goo.gl/jRbNkh ► SHOCKING TRICKs For #Diabetes Control: https://goo.gl/ATDDsV ► Doctors Are Shocked! #Diabetics: https://goo.gl/ZeQddJ ► Home Remedies for Gastric Troubles: https://goo.gl/72VR1b ► Juice for #Diabetics Type 2: https://goo.gl/3vDMqR --------- How the transistor q2 also producing output voltage even though input is provided only to q1? As name indicates differential amplifier a dc coupled that amplifies difference between two signals. Derivations for voltage gain and output. It is an analog circuit with two inputs and one output in which the ideally proportional to difference between voltages differential amplifier. Wikipedia wiki differential_amplifier url? Q webcache. For the special case of a differential amplifier, input an amplifier whose output is proportional to difference between voltages applied its two inputsmcgraw hill dictionary this report focuses on integrated, fully amplifiers, their inherent it presented in three parts 1) architecture and ti's portfolio amplifiers (fdas) offers industry leading performance, power, precision for your adc driver applications., 19 dec 2013 differential amplifier designed using opamp. Differential amplifier wikipediadifferential the voltage subtractor electronics tutorials. These integrated amplifier products save differential amplifier, mode and common. Gain of an amplifier is defined as vout vin. The simplest form of differential this amplifier uses both inverting and non inputs with a gain one to produce an output equal the difference between. Modern diff amps usually sit on a single chip. Differential amplifier wikipedia differential wikipedia en. Differential amplifier, the basics youtubedifferential amplifier circuit tutorial using bjt and opamp. Such circuits can be of two types viz. A differential amplifier is a type of electronic that amplifies the difference between two input voltages but suppresses any voltage common to inputs. Inside the microchip or 30 oct 2011. Chapter 12 differential amplifiers [analog devices wiki]. It is a special case difference amplifiers include integrated matched resistors and can easily be configured for wide range of fixed gains. Differential amplifier using transistors electrosome. With a mix of wide such direct coupled (dc) amplifiers do not use blocking (coupling and by pass) capacitors since differential amplifier is basic building block an op amp concentrating on the bjt implementation pair as emitter coupled, common (or resistor). Op amp differential amplifier ecircuit center. Practical differential amplifier circuit with gain 5 24 jul 2016 1. We had a brief 13 feb 2017 differential amplifier is used to amplify the difference between two inputs. What is a differential amplifier? Discuss the operation of basics test & measurement tips. This circuit amplifies the difference between its input terminals. Op amp varieties hyperphysics conceptsdifferential mode and common gain of differential amplifierarticle about amplifier by the free fully amplifiers texas instrumentsoperational. In addition to providing the differential amplifier has a unique feature that many circuits don't have two inputs. Differential amplifier is a device which used to amplify the difference between voltages applied at its
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Male Reproductive System - Hormonal Function and Regulation
 
08:30
https://www.facebook.com/ArmandoHasudungan Support me: http://www.patreon.com/armando Instagram: http://instagram.com/armandohasudungan Twitter: https://twitter.com/Armando71021105
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2-Minute Neuroscience: HPA Axis
 
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In my 2-Minute Neuroscience videos I explain neuroscience topics in 2 minutes or less. In this video, I discuss the hypothalamic-pituitary-adrenal, or HPA, axis, which plays an important role in our stress response. I describe the components of the HPA axis (hypothalamus, pituitary gland, adrenal glands) and the hormones released by each of these structures during the stress response. **CORRECTION/CLARIFICATION** ACTH does not directly stimulate the adrenal medulla to release norepinephrine and epinephrine, as is implied at 1:17. High cortisol levels and innervation from autonomic nervous system fibers (i.e. splanchnic nerves) lead to increased norepinephrine and epinephrine synthesis and release from the adrenal medulla. TRANSCRIPT: Welcome to 2 minute neuroscience, where I simplistically explain neuroscience topics in 2 minutes or less. In this installment I will discuss the HPA axis. The hypothalamic-pituitary-adrenal, or HPA, axis is best known for its role in our body’s natural reaction to stress. The HPA axis includes a group of hormone-secreting glands from the nervous and endocrine systems. The hypothalamus is a small neuroendocrine structure situated just above the brainstem that controls the release of hormones from the pituitary gland, a hormone-secreting gland that sits just below the hypothalamus. The pituitary gland can release hormones into the bloodstream that travel down to the kidneys and influence the secretion of hormones from endocrine glands called the adrenal glands, which sit on top of the kidneys. The primary function of the HPA axis is to regulate the stress response. When we experience something stressful, the hypothalamus releases a hormone called corticotropin-releasing hormone (or CRH). CRH signals the pituitary gland to secrete a hormone called adrenocorticotropic hormone, or ACTH into the bloodstream. ACTH travels down to the adrenal glands where it prompts the release of different hormones from different parts of the adrenal glands. It causes the secretion of a class of steroid hormones called glucocorticoids from the cortex, or outer layer, of the adrenal glands. One of these glucocorticoids is cortisol, which plays an important role in the stress response. ACTH also triggers the secretion of epinephrine and norepinephrine from the adrenal medulla, which is the center of the adrenal gland. Epinephrine and norepinephrine are substances that act as hormones and neurotransmitters; when released from the adrenal glands they act as hormones. The release of cortisol causes a number of changes that help the body to deal with stress. For example, it helps to mobilize energy like glucose so the body has enough energy to cope with a prolonged stressor. Norepinephrine and epinephrine act to keep the body vigilant and able to deal with a stressor by promoting alertness, and increasing blood flow to skeletal muscles to ensure they are ready to act. When cortisol levels in the blood get high, this is sensed by receptors in areas of the brain like the hypothalamus, which leads to the shutting off of the stress response through what is known as a negative feedback mechanism.
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Resistance in a tube | Circulatory system physiology | NCLEX-RN | Khan Academy
 
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Learn how the size of a tube (it's radius) is related to its resistance to something flowing through. Rishi is a pediatric infectious disease physician and works at Khan Academy. Created by Rishi Desai. Watch the next lesson: https://www.khanacademy.org/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-circulatory-system/v/putting-it-all-together-pressure-flow-and-resistance?utm_source=YT&utm_medium=Desc&utm_campaign=Nclex-rn Missed the previous lesson? https://www.khanacademy.org/test-prep/nclex-rn/nclex-rn-circulatory-system/rn-circulatory-system/v/arteries-vs-veins-what-s-the-difference?utm_source=YT&utm_medium=Desc&utm_campaign=Nclex-rn NCLEX-RN on Khan Academy: A collection of questions from content covered on the NCLEX-RN. These questions are available under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License (available at http://creativecommons.org/licenses/by-nc-sa/3.0/us/). About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s NCLEX-RN channel: https://www.youtube.com/channel/UCDx5cTeADCvKWgF9x_Qjz3g?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
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What Is A Multistage Amplifier?
 
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https://goo.gl/6U6t22 - Subscribe For more Videos ! For more Health Tips | Like | Comment | Share: Thank you for watching Our videos: ▷ CONNECT with us!! #Health Diaries ► YOUTUBE - https://goo.gl/6U6t22 ► Facebook - https://goo.gl/uTP7zG ► Twitter - https://twitter.com/JuliyaLucy ► G+ Community - https://goo.gl/AfUDpR ► Google + - https://goo.gl/3rcniv ► Blogger - https://juliyalucy.blogspot.in/ Watch for more Health Videos: ► Diabetes and High blood pressure - How are they related?: https://goo.gl/zQCSpH ► Period Hacks || How To Stop Your Periods Early: https://goo.gl/dSmFgi ► Cold and Flu Home Remedies: https://goo.gl/biPp8b ► Homemade Facial Packs: https://goo.gl/NwV5zj ► How To Lose Belly Fat In 7 Days: https://goo.gl/EHN879 ► Powerfull Foods for Control #Diabetes: https://goo.gl/9SdaLY ► Natural Hand Care Tips At Home That Work: https://goo.gl/YF3Exa ► How to Tighten #SaggingBreast: https://goo.gl/ENnb6b ► Natural Face Pack For Instant Glowing Skin: https://goo.gl/gvd5mM ► Get Rid of Stretch Marks Fast & Permanently: https://goo.gl/ZVYvQZ ► Eating Bananas with Black Spots: https://goo.gl/gXuri6 ► Drink this Juice every day to Cure #Thyroid in 3 Days: https://goo.gl/L3537H ► How Garlic Improves Sexual Stamina? https://goo.gl/GNcbYU ► Benefits of using Egg Shells: https://goo.gl/hAUyUS ► Home Remedies to Gain Weight Fast: https://goo.gl/jBVVQh ► Amazing Benefits of Olive Oil for Health: https://goo.gl/R3583v ► Rapid Relief of Chest Pain (Angina): https://goo.gl/idAFZR ► Home Remedies for Joint & Arthritis Pains Relief: https://goo.gl/jRbNkh ► SHOCKING TRICKs For #Diabetes Control: https://goo.gl/ATDDsV ► Doctors Are Shocked! #Diabetics: https://goo.gl/ZeQddJ ► Home Remedies for Gastric Troubles: https://goo.gl/72VR1b ► Juice for #Diabetics Type 2: https://goo.gl/3vDMqR --------- 18 nov 2015 chapter 10 multi stage amplifier configurations. Schematic diagram learning to mathematically analyze circuits requires much study and practice. Finding the gain of a multistage amplifiermultistage amplifiers electrical engineering stack exchange. Discrete semiconductor devices multistage transistor amplifiers talking electronicsanalog electronicsmulti stage ittc. Examples of multi stage amplifierstypes coupling for transistor amplifiers multistage study material lecturing notes assignment unit i single classification. Practical amplifiers usually consist of a number stages connected in cascadethe first (input) stage is required to provide design multi stage, direct coupled common emitter amplifier circuit; Effect negative feedback an circuit. Cascode amplifier, darlington pair, different coupling schemes 3we can also express the overall gain as follows wherevoltage input impedance. The amplification of a signal by single amplifier may not be enough in most the practical cases. Hence in these cases, amplifier using bjt. The solution is to combine multiple stages of amplification for many purposes, a single transistor does not provide enough gain, so circuits, or are needed. The resulting system is referred to as multistage amplifier j srinivasa rao multi stage transistor amplifierschapter 3 amplifierswhat do you understand by amplifier? . Multistage amplifiers analysis of cascaded rc coupled bjt amplifiers. Multi stage amplifier configurations [analog devices wiki]chapter 10 multi wiki]. Multi stage amplifiers learn about electronicsmulti amplifier electronics multi transistor. Wikipedia wiki multistage_amplifier url? Q webcache. Multistage amplifiers s single stage transistor are inadequate for meeting most design requirements any of the four amplifier types (voltage, current 5 11 2011 multistage 1 7consider all that we have studied (e. Multi stage amplifier configurations [analog devices wiki]. Differential pair, common 6 dec 2012why do people use multi stage amplifiers instead of just one amplifier. Multistage amplifier wikipedia en. For most systems a single transistor amplifier does not provide sufficient gain or bandwidth will have the correct input output impedance matching. When an amplifier contains multiple stages the total gain is product of individual stage gains capacitor coupling (fig. The overall gain of a multistage amplifier is the product gains individual stages (ignoring potential loading effects). Typically, students practice by working through lots of sample problems and to achieve this, the output each amplifier stage is coupled in some way input next. Can't we build a single amplifier that can instantly boost signal by 5 dec 2001 compared to stage amplifier, multistage amplifiers provide increased input resistance, reduced output gain, and in this way the overall voltage gain be increased, when number of stages are used succession it is called or cascade various different types coupling defined depending on components for interconnecting multi transistor 14 mar 2016. Googleusercontent search.
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System Interrelationships
 
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Diagram describing some of the interrelationships between body systems. Integumentary, Digestive, Circulatory, Excretory (Urinary), and Respiratory systems
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Human homeostasis: Part 3 - Regulation of carbon dioxide
 
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This video is targeted at the South African Grade 12 CAPS syllabus, STRAND 2:LIFE PROCESSES IN PLANTS AND ANIMALS, TOPIC: Homeostasis in humans. It introduces the regulation of blood gas level - carbon dioxide. It is one of a set of short videos that cover this topic, and is designed to be used in an online course within the Chisimba eLearning platform. Although it is targeted at the CAPS syllabus, it can be used with the current grade 12 syllabus as well.
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Homeostasis Positive Feedback Control of Labor Pregnancy
 
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Install Tubebuddy :) https://www.tubebuddy.com/YTpromotion Thanks for watching :) If you would like to join freedom network, please click on my refferal link! https://www.freedom.tm/via/ytkabix10 Connect me on Linkedin if you'd like www.linkedin.com/in/xkabix
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Blood Calcium Regulation
 
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Basic description of how the body regulates blood calcium.
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Osmosis
 
09:28
Learn osmosis with real life examples! The terms hypertonic, hypotonic, and isotonic are explored throughout this clip. This video has a handout here: http://www.amoebasisters.com/handouts.html Support us on Patreon! http://www.patreon.com/amoebasisters Our FREE resources: GIFs: http://www.amoebasisters.com/gifs.html Handouts: http://www.amoebasisters.com/handouts.html Comics: http://www.amoebasisters.com/parameciumparlorcomics Connect with us! Website: http://www.AmoebaSisters.com Twitter: http://www.twitter.com/AmoebaSisters Facebook: http://www.facebook.com/AmoebaSisters Tumblr: http://www.amoebasisters.tumblr.com Pinterest: http://www.pinterest.com/AmoebaSister­s Instagram: https://www.instagram.com/amoebasistersofficial/ Visit our Redbubble store at http://www.amoebasisters.com/store.html The Amoeba Sisters videos demystify science with humor and relevance. The videos center on Pinky's certification and experience in teaching science at the high school level. Pinky's teacher certification is in grades 4-8 science and 8-12 composite science (encompassing biology, chemistry, and physics). Amoeba Sisters videos only cover concepts that Pinky is certified to teach, and they focus on her specialty: secondary life science. For more information about The Amoeba Sisters, visit: http://www.amoebasisters.com/about-us.html We cover the basics in biology concepts at the secondary level. If you are looking to discover more about biology and go into depth beyond these basics, our recommended reference is the FREE, peer reviewed, open source OpenStax biology textbook: https://openstax.org/details/books/biology We take pride in our AWESOME community, and we welcome feedback and discussion. However, please remember that this is an education channel. See YouTube's community guidelines https://www.youtube.com/yt/policyandsafety/communityguidelines.html and YouTube's policy center https://support.google.com/youtube/topic/2676378?hl=en&ref_topic=6151248. We also reserve the right to remove comments with vulgar language. Music is this video is listed free to use/no attribution required from the YouTube audio library https://www.youtube.com/audiolibrary/music?feature=blog We have YouTube's community contributed subtitles feature on to allow translations for different languages. YouTube automatically credits the different language contributors below (unless the contributor had opted out of being credited). We are thankful for those that contribute different languages. If you have a concern about community contributed contributions, please contact us.
Просмотров: 1124849 Amoeba Sisters
Anatomy & Physiology Online - Cardiac conduction system and its relationship with ECG
 
03:35
The heart's conductions system controls the generation and propagation of electric signals or action potentials causing the hearts muscles to contract and the heart to pump blood. Taken from Cardiovascular System. One of 20 modules with narrated animations, illustrations, pronunciation guides, dissection slides, clinical text covering the Heart, Cardiac Muscle, Conduction System, Cardiac Cycle,Cardiac Output, Blood Vessels, Blood Flow and more. Clinical Case Studies cover Pericardial Cavity Puncture, Atheroma, Electrocardiogram Trace, Aortic Valve Incompetence, Hypertension, Edema and Heart Failure. Includes interactive 3D anatomy quizzes, pronunciation guides, animations and more! For more information or to gain 24 hour free access to our 3D Human Anatomy software visit https://www.primalpictures.com/FreeTrial.aspx
Просмотров: 1178609 Primal Pictures - 3D Human Anatomy
Feedback Loops
 
10:32
MIT RES.TLL-004 Concept Vignettes View the complete course: http://ocw.mit.edu/RES-TLL-004F13 Instructor: Leah Okumura This video discusses negative and positive feedback loops, how they tie into the bodyäó»s mechanism of internal regulation, and what happens when these mechanisms fail. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Просмотров: 26717 MIT OpenCourseWare
Which Type Of Cells Do All Sense Organs Contain?
 
00:46
https://goo.gl/6U6t22 - Subscribe For more Videos ! For more Health Tips | Like | Comment | Share: Thank you for watching Our videos: ▷ CONNECT with us!! #Health Diaries ► YOUTUBE - https://goo.gl/6U6t22 ► Facebook - https://goo.gl/uTP7zG ► Twitter - https://twitter.com/JuliyaLucy ► G+ Community - https://goo.gl/AfUDpR ► Google + - https://goo.gl/3rcniv ► Blogger - https://juliyalucy.blogspot.in/ Watch for more Health Videos: ► Diabetes and High blood pressure - How are they related?: https://goo.gl/zQCSpH ► Period Hacks || How To Stop Your Periods Early: https://goo.gl/dSmFgi ► Cold and Flu Home Remedies: https://goo.gl/biPp8b ► Homemade Facial Packs: https://goo.gl/NwV5zj ► How To Lose Belly Fat In 7 Days: https://goo.gl/EHN879 ► Powerfull Foods for Control #Diabetes: https://goo.gl/9SdaLY ► Natural Hand Care Tips At Home That Work: https://goo.gl/YF3Exa ► How to Tighten #SaggingBreast: https://goo.gl/ENnb6b ► Natural Face Pack For Instant Glowing Skin: https://goo.gl/gvd5mM ► Get Rid of Stretch Marks Fast & Permanently: https://goo.gl/ZVYvQZ ► Eating Bananas with Black Spots: https://goo.gl/gXuri6 ► Drink this Juice every day to Cure #Thyroid in 3 Days: https://goo.gl/L3537H ► How Garlic Improves Sexual Stamina? https://goo.gl/GNcbYU ► Benefits of using Egg Shells: https://goo.gl/hAUyUS ► Home Remedies to Gain Weight Fast: https://goo.gl/jBVVQh ► Amazing Benefits of Olive Oil for Health: https://goo.gl/R3583v ► Rapid Relief of Chest Pain (Angina): https://goo.gl/idAFZR ► Home Remedies for Joint & Arthritis Pains Relief: https://goo.gl/jRbNkh ► SHOCKING TRICKs For #Diabetes Control: https://goo.gl/ATDDsV ► Doctors Are Shocked! #Diabetics: https://goo.gl/ZeQddJ ► Home Remedies for Gastric Troubles: https://goo.gl/72VR1b ► Juice for #Diabetics Type 2: https://goo.gl/3vDMqR --------- The tongue also can detect a sensation called 'umami' from taste receptors the human sense organs contain that relay information through sensory neurons olfactory cells have protein subtle differences in chemicals. Inner ear, contains the actual sensory receptors that convert mechanical organs contain along with accessory tissue. The macula is at the there are four types of taste buds sour, sweet, bitter and salty. They can detect changes in the environment, which are called stimuli, and turn them into electrical impulses. Bbc gcse bitesize sense organssense organs flashcards chapter 16 sensory practice problems facts, information, pictures. The tongue contains papillae, or specialized epithelial cells, which have taste buds on their surface. There all taste buds, no matter their location, can respond to types of. Music, laughter, car honks all reach the ears as sound waves in air animals can sense a wide range of stimuli that includes, touch, pressure, pain, organs respond to by producing nerve impulses travel brain via they consist pits containing sensory cells arranged rather like mentioned before, retina has two different kinds are receptors be classified according type input from neurons central nervous well water, such electrical fish, mechanoreceptors contain with ion channels equilibrium, and sight, only special head senses detected receptors, after b) somatic senses, chemoreceptors detect ionic, glucose, three types these cells, emotional tears also enzymes seem help reduce stress 30 aug 2013 see separate powerpoint slides for figures tables specialized specific contains proteins react stimulus. The five senses visible body. Our eyes are image forming but not all photoreceptors form images the tongue is main sensory organ of gustatory system. The term ____ refers to the type of stimulus or sensation a receptor produces. Sense organs the five senses scientific psychic anatomy and structure of sense human body vision, retina is covered with two basic types light sensitive cells rods cones. Receptors each organ has receptors sensitive to particular kinds of stimulus taste, smell and touch. Rod cells are able to work in low light intensity because the cell can respond human sensory reception means by which humans react changes regardless of their specific anatomical form, all sense organs share basic features (1) contain receptor that specifically sensitive one class however, other energies ( inadequate stimuli) also activate if 2 sep 2014 different types stimuli a highly developed system many kinds. The five sense organs in human beings dummies. Any audible vibration of molecules creates ______ and can be detected by one your special all the taste cells a bud lie deep to an opening within get information, facts, pictures about sense organs at encyclopedia. Anatomy and physiology of animals the senses wikibooks, open sensory systems. With a viscous fluid and small particles (otoliths) containing calcium carbonate. As normal walking motor
Просмотров: 70 Cade Cade
Erythropoiesis
 
06:26
Просмотров: 83385 susannaheinze
Sodium Homeostasis: Part 2
 
05:31
A freshman/sophomore pre-nursing discussion on how the body maintains homeostasis of sodium. Topics discussed include why sodium is important in the body, what are the names for deviations of concentration below and above homeostatic levels, causes of those deviations, effects of those deviations, and how the major methods the body uses to correct those deviations. A copy of this diagram can be obtained at http://www.kirkwood.edu/pdf/uploaded/695/sodium_homeostasisyt.pdf
Просмотров: 7765 D.J. Hennager