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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: 47704 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: 103957 Alila Medical Media
Blood Pressure Negative Feedback Loop
 
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This Human Biology video teaches Negative feedback loop of blood pressure. Sensors, control center, hormone and effectors.
Просмотров: 392 BYU-Idaho Academic Support
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: 799174 Mechanisms in Medicine
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: 274855 Amoeba Sisters
8.8.2 Blood Pressure Regulation
 
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http://braingenie.com/
Просмотров: 62404 braingenie
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: 486689 Handwritten Tutorials
Insulin and the Regulation of Glucose in the Blood
 
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Milwaukee School of Engineering's Center for BioMolecular Modeling discusses the role of the protein insulin in the regulation of glucose in the bloodstream.
Просмотров: 426418 MarkHoelzer
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: 218563 JamJarMMX
Male Reproductive System - Hormonal Function and Regulation
 
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https://www.facebook.com/ArmandoHasudungan Support me: http://www.patreon.com/armando Instagram: http://instagram.com/armandohasudungan Twitter: https://twitter.com/Armando71021105
Просмотров: 347540 Armando Hasudungan
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: 7293 D.J. Hennager
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: 11205 Paul Nathan
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: 331277 Bozeman Science
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: 15134 Kabi
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: 3472 Whats Up Dude
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: 4966 Janux
Mechanism of Breathing, Animation
 
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Physiology of breathing (pulmonary ventilation): air pressure basics, inspiration and expiration cycle, deep breathing, resistance to airflow, lung compliance, elasticity. Support us on Patreon and get FREE downloads and other great rewards: patreon.com/AlilaMedicalMedia This video and other related images/videos (in HD) are available for instant download licensing here : https://www.alilamedicalmedia.com/-/galleries/images-videos-by-medical-specialties/pulmonology ©Alila Medical Media. All rights reserved. Voice by: Ashley Ottesen 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. Pulmonary ventilation, commonly referred to as breathing, is the process of air flowing IN and OUT of the lungs during INspiration and EXpiration. The air movements are governed by the principles of gas laws. Basically: - air flows from HIGHER to LOWER pressure; - pressure within a cavity INcreases when its volume DEcreases, and vice versa; - volume of a given amount of gas INcreases with INcreased temperature. At rest, in between breaths, the pressure inside the lungs, or intrapulmonary pressure, EQUALS the pressure outside the body, or atmospheric pressure. When discussing respiratory pressures, this is generally referred to as a RELATIVE pressure of ZERO. This is because what matters is the DIFFERENCE between the two pressures, NOT their absolute values. Thus, a NEGATIVE pressure is a pressure BELOW atmospheric, while a POSITIVE pressure is ABOVE atmospheric. The lungs are covered in a double-layer membrane, which forms a THIN space surrounding the lungs, called the PLEURAL cavity. The pressure within the pleural cavity, or intrapleural pressure, is normally negative. This negative pressure acts like a SUCTION to keep the lungs inflated. If this becomes zero, such as in the case of pneumothorax, when the chest wall is punctured and the pleural cavity has the same pressure as the outside air, the lung would COLLAPSE. Pulmonary ventilation is achieved by rhythmically changing the volume of the thoracic cavity. During inspiration, the diaphragm and the external intercostal muscles contract, expanding the thoracic cavity and the lungs. This INcrease in volume results in a DEcrease in pressure, causing outside air to flow IN. Another factor that helps to inflate the lungs is the warming of the inhaled air. This effect is most notable on a cool day, when the temperature outside is significantly lower, the inhaled air INcreases in volume as it warms up inside the body and inflates the lungs, FURTHER facilitating inhalation. While inspiration requires muscular contraction and hence energy expenditure, expiration during quiet breathing is a PASSIVE process. As the diaphragm returns to its original position and the muscles relax, thoracic and lung volumes DEcrease and pressures INcrease, pushing air OUT of the lungs. Quiet expiration relies therefore on the ELASTICITY of the lungs and rib cage - their ability to SPRING BACK to the original dimensions. Conditions that REDUCE pulmonary elasticity, such as emphysema, can cause difficulty EXhaling. Deep breathing requires more forceful contractions of the diaphragm, intercostal muscles, and involves ADDITIONAL muscles to produce LARGER changes in the thoracic volume. DEEP expiration, unlike quiet expiration, is an active process. Another factor that affects ventilation is the RESISTANCE to airflow, which exists within the lung tissues and in the airways. Lung COMPLIANCE refers to the EASE with which the lungs EXPAND. Healthy lungs normally have HIGH compliance, LOW resistance, like a THIN balloon, easy to inflate. Lung compliance is REDUCED when the lungs become “STIFF”, in conditions that cause scarring of lung tissues, or fibrosis. In this case the lung turns into a THICK balloon, harder to inflate. Diseases that NARROW the airways, such as asthma, INcrease resistance, making it harder to breathe. The airways may also DILATE or CONSTRICT in response to various factors. For example, parasympathetic stimulation and histamine typically narrow the bronchioles, INcrease resistance and DEcrease airflow; while epinephrine, a hormone released during exercises, dilates bronchioles and thereby INcreases airflow.
Просмотров: 21447 Alila Medical Media
Positive Feedback of Blood Clotting Through Music
 
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This short animation shows the positive feedback loop of blood clotting. Music is used as an analogy for the positive feedback loop. As the music intensifies, the blood clotting cascade occurs more and more frequently. The key to the actors of this claymation can be revisited at time point 0:13 if needed. The music and video are both self-produced by Amanda Rowlands and Sandy Shergill for HSCI 333.
Просмотров: 1228 Sandy Shergill
Negative Feedback and the RAAS
 
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Negative feedback mechanisms, the renin, angiotension, aldosterone system and treatments for hypertension, heart attack and congestive heart failure based on the RAAS.
Просмотров: 2285 TheAncientScholar
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: 9873 Janux
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: 310649 Biomed Sessions
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: 689294 Bozeman Science
Renin Angiotensin Aldosterone System (RAAS) - Short and sweet!
 
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What is the Renin Angiotensin Aldosterone System (RAAS) and how to remember it easily. For more fun information, visit http://instagram.com/tootrn or www.tootRN.com
Просмотров: 415762 tootRN, LLC.
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: 48998 Prof Camenares
What is Homeostasis ? It's Meaning and Definition | Homeostasis is the tendency of organisms to.....
 
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What is Homeostasis ? It's Meaning and Definition | Homeostasis is the tendency of organisms to..... CLICK TO GET COMPLETE COURSE :-https://gradesetter.com/ homeostasis is the condition in which the body maintains homeostasis and regulation homeostasis and temperature homeostatic control of glucose in the human body human systems and homeostasis body fluid homeostasis homeostasis refers to homeostasis and cell processes homeostasis simple definition feedback system biology homeostasis and blood pressure cells maintain homeostasis homeostasis and sweating what is homeostasis in the human body what systems of the body control homeostasis body's internal environment homeostasis hormones constant internal environment why is it important to maintain homeostasis in the body negative feedback blood sugar homeostasis in the ecosystem the body's control system body systems involved in homeostasis ways the body maintains homeostasis what can affect homeostasis ways to maintain homeostasis define homeostasis in biology describe the mechanisms of the homeostatic system mechanisms of the homeostatic system how is homeostasis maintained which body system keeps your body in equilibrium or homeostasis what maintains homeostasis in the body body maintaining homeostasis what is homeostasis and why is it important what is the definition of homeostasis a constant internal environment maintained by cells explain negative feedback in homeostasis homeostasis and temperature regulation in humans positive feedback human body explain the principles of homeostasis organ systems and homeostasis negative feedback in human body body temp homeostasis how does the nervous system help the body maintain homeostasis organ systems involved in homeostasis homeostasis oxygen and carbon dioxide levels human body temperature control system negative and positive feedback of homeostasis homeostatic mechanisms in the human body health and homeostasis concept of homeostasis feedback mechanisms in the body three homeostatic mechanisms homeostasis organ systems homeostasis and body fluids homeostasis and the human body homeostasis diagram in a negative feedback system the response of the effector homeostasis and its various aspects homeostatic event homeostasis def homeostasis stimulus homeostasis depends on negative feedback mechanism in homeostasis positive feedback physiology homeostasis theory homeostasis definition science set point physiology five body functions that monitor homeostasis body temperature control center what body systems help maintain homeostasis how does homeostasis work what system maintains homeostasis maintaining body temperature homeostasis blood sugar levels homeostasis which body system regulates body temperature body regulation mechanisms describe one way your body maintains homeostasis homeostasis book homeostasis medical definition explain the concept of homeostasis feedback biology feedback systems in the body water homeostasis blood and homeostasis homeostasis meaning in hindi oxygen regulation homeostasis homeostasis for kids homeostasis definition psychology homeostasis water levels lungs as homeostatic organ homeostasis medical nervous system homeostasis homeostasis activity examples of homeostasis in the human body positive feedback loop in the body homeostasis cycle homeostasis disorders list homeostasis definition for dummies homeostasis disease coagulation contributes to homeostasis by blood ph homeostasis components of homeostasis homeostasis and thermoregulation which phrase best describes homeostasis hormones involved in homeostasis homeostasis in animals homeostasis and feedback mechanisms human biology health homeostasis and the environment define the term homeostasis process by which the body's internal environment is kept stable positive feedback definition biology what is an example of homeostasis homeostasis facts homeostasis and feedback loops homeostasis definition anatomy immune system and homeostasis negative feedback temperature control human body feedback system positive feedback system in the body positive feedback childbirth homeostasis what is meant by homeostasis negative feedback temperature regulation list three examples of daily activities that affect homeostasis blood glucose levels homeostasis homeostasis and blood sugar an example of homeostasis homeostatic mechanisms for regulation of blood glucose levels..........
Просмотров: 22 GradeSetter E-learning Platform
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
Просмотров: 466330 Dr John Kenworthy
Formation of Urine - Nephron Function, Animation.
 
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Renal physiology - The 3 stages of urine formation. 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/urology ©Alila Medical Media. All rights reserved. Support us on Patreon and get FREE downloads and other great rewards: patreon.com/AlilaMedicalMedia The kidneys filter blood plasma, removing metabolic wastes, toxins from the body and excrete them in the form of urine. During this process, they also maintain constant volume and composition of the blood, or homeostasis. Blood enters the kidney via the renal artery, which divides to smaller arteries and finally arterioles. The arterioles get into contact with functional units of the kidney called nephrons. This is where blood filtration and urine formation take place. The filtered blood is then collected in to a series of larger veins and exits the kidney through the renal vein. The urine is collected in collecting ducts and leaves the kidney via the ureters. A nephron consists of 2 major parts: Bowman’s capsule; and a long renal tubule. Renal tubules of several nephrons connect to a common collecting duct. There are 3 steps in the formation of urine: glomerular filtration, tubular reabsorption and secretion, water conservation. Blood enters the Bowman’s capsule via the afferent arteriole, passes through a ball of capillaries called the glomerulus, and leaves via the efferent arteriole. Hydrostatic and osmotic pressures drive water and solutes from blood plasma through a filtration membrane into the capsular space of nephron. These include water, inorganic ions, glucose, amino acids and various metabolic wastes such as urea and creatinine. The amount of filtrate produced per minute is called glomerular filtration rate, or GFR. The GFR is kept at a stable value by several feedback mechanisms within the kidneys. This is known as renal autoregulation. The GFR is also under sympathetic and hormonal control. The proximal convoluted tubule, reabsorbs about two thirds of the filtrate. In this process, water and solutes are driven through the epithelial cells that line the tubule into the extracellular space. They are then taken up by the peritubular capillaries. Sodium re-absorption is most important, as it creates osmotic pressure that drives water and electrical gradient that drives negatively charged ions. Sodium level inside the epithelial cells is kept low thanks to the sodium-potassium pumps that constantly pump sodium ions out into the extracellular space. This creates a concentration gradient that favors sodium diffusion from tubular fluid into the cells. Sodium is absorbed by symport proteins that also bind glucose and some other solutes. About half of nitrogenous wastes also re-absorbs back to the bloodstream. Some of the re-absorption also occurs by the paracellular route through tight junctions between the epithelial cells. At the same time, tubular secretion also takes place. The main function of the loop of Henle is to create and maintain an osmolarity gradient in the medulla that enables the collecting ducts to concentrate urine at a later stage. The ascending limb of the loop actively pumps sodium out making the medulla “salty”. The descending limp of the loop is permeable to water but much less to sodium. As the water exits the tubule by osmosis, the filtrate gets more and more concentrated as it reaches the bottom. The ascending limb, on the other hand, is permeable to ions but not water. As a result, the filtrate loses sodium as it goes up and becomes more diluted at the top of the loop. Re-absorption and secretion in the distal convoluted tubule are under control of various hormones. The main function of the collecting duct is to concentrate urine and therefore conserve water. As it gets saltier deep in the medulla, the filtrate loses more and more water as it flows down the collecting duct. The collecting duct is also under hormonal control so it can adjust the amount of re-absorbed water accordingly to the body’s state of hydration. 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: 227620 Alila Medical Media
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 -~-~~-~~~-~~-~-
Просмотров: 13765 Vinay Rajput Tutorial
Endocrine System, part 1 - Glands & Hormones: Crash Course A&P #23
 
10:25
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
Просмотров: 2004723 CrashCourse
Blood Calcium Regulation
 
08:21
Basic description of how the body regulates blood calcium.
Просмотров: 39362 Rene LaMontagna
The hypothalamus and pituitary gland | Endocrine system physiology | NCLEX-RN | Khan Academy
 
06:35
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: 613796 khanacademymedicine
Respiratory System, part 2: Crash Course A&P #32
 
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Can a paper bag really help you when you are hyperventilating? It turns out that it can. In part 2 of our look at your respiratory system Hank explains how your blood cells exchange oxygen and CO2 to maintain homeostasis. We'll dive into partial pressure gradients, and how they, along with changes in blood temperature, acidity, and CO2 concentrations, change how hemoglobin binds to gases in your blood. (And yes, we'll explain the paper bag thing too!) Table of Contents How Blood Cells Exchange Oxygen and CO2 2:23 Partial Pressure Gradients 2:41 How Hemoglobin Binds to Gases in the Blood 4:40 The Thing With The Bag 9:04 *** Crash Course is 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, Jan Schmid, Simun Niclasen, Robert Kunz, Daniel Baulig, Jason A Saslow, Eric Kitchen, Christian, Beatrice Jin, Anna-Ester Volozh, Eric Knight, Elliot Beter, Jeffrey Thompson, Ian Dundore, Stephen Lawless, Today I Found Out, James Craver, Jessica Wode, Sandra Aft, Jacob Ash, SR Foxley, Christy Huddleston, Steve Marshall, Chris Peters -- 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
Просмотров: 1030441 CrashCourse
The Behavioural Illusion - Stimulus Response simulated in a negative feedback loop
 
01:01
This brief clip uses Bill Powers (2008) Live Block Diagram to illustrate that if you provide a sudden change to the environment of a control system, it 'responds' with a sudden change in output. It seems to show that a response follows the 'stimulus'. However, this is an artefact of how the change in environment is presented. During everyday life most sensory input is continuous and often under the control of the organism (we select what to look at, attend to, and move towards). Only a negative feedback control system, that acts dynamically with the environment to control perception, can achieve this purposeful process. The appearance that our responses are 'triggered' by the environment is an illusion, created by providing sudden disturbances. Also, this 'triggering' only works for a disturbance that is (a) sensed by the organism and (b) that the organism is attempting to control. For more on this including more detail about how control systems are organised and optimised... see www.pctweb.org
Просмотров: 873 Warren Mansell
What Kind Of Feedback Is Blood Clotting?
 
00:47
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: 147 Evette Freudenburg Tipz
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.
Просмотров: 20456 Derek Keats
ADH in the Human Body
 
01:26
Antidiuretic hormone's function in the body explained.
Просмотров: 2123 Colette Fritsche
Endocrine System Negative Feedback
 
05:03
How are the levels of glucose in the blood maintained?
Просмотров: 15290 Tim Barlow
Erythropoiesis
 
06:26
Просмотров: 86915 susannaheinze
lecture11final
 
03:14
In this video I talked about positive feedback loops and give examples.I invite you to visit my website, www.joaoarantes.com.br, there are a lot of system dynamics information ( links, models, etc). If you have questions about this presentation, please write me ( jarantes@alum.mit.edu), I will be glad to answer.
Просмотров: 192 João Arantes
HOMEOSTASIS: NEGATIVE FEEDBACK MECHANISMS
 
01:52
Просмотров: 12009 Walter Jahn
The Negative Feedback Loop of Objection to City Density
 
01:56
Romer explains how traffic congestion leads locals to oppose the building of more dense structures, but how greater density can make mass transit systems more feasible.
Просмотров: 117 EconTalk
Negative Feedback Loop
 
00:17
Просмотров: 39 MsLydiaL
Feedback Loops
 
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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: 27071 MIT OpenCourseWare
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: 1188144 Primal Pictures - 3D Human Anatomy
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: 307296 khanacademymedicine
lecture12final
 
04:26
In this video I talked about negative feedback loops and give examples.I invite you to visit my website, www.joaoarantes.com.br, there are a lot of system dynamics information ( links, models, etc). If you have questions about this presentation, please write me ( jarantes@alum.mit.edu), I will be glad to answer.
Просмотров: 86 João Arantes
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: 1333151 CrashCourse
Working Mechanism of Human Heart
 
02:58
watch how our heart functions !
Просмотров: 1111 Bikas Dangol
Maintaining Osmotic Homeostasis + Blood Volume
 
01:56
-- Created using PowToon -- Free sign up at http://www.powtoon.com/youtube/ -- Create animated videos and animated presentations for free. PowToon is a free tool that allows you to develop cool animated clips and animated presentations for your website, office meeting, sales pitch, nonprofit fundraiser, product launch, video resume, or anything else you could use an animated explainer video. PowToon's animation templates help you create animated presentations and animated explainer videos from scratch. Anyone can produce awesome animations quickly with PowToon, without the cost or hassle other professional animation services require.
Просмотров: 85 Andi Delgado
Homeostasis: Blood-Calcium Levels in Plain English
 
04:25
Homeostasis
Просмотров: 3810 Nick Gaston