Homeostasis - Wikipedia, the free encyclopedia
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Homeostasis (from Greek: ὅμος, hómos , "similar"; and ιστημι, histēmi , "standing still"; defined by Walter Bradford Cannon in 1929 + 1932) is the property of a system, either open or closed, tha...
en.wikipedia.org/wiki/Homeostasis
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Often, however, positive feedback produces the very opposite of homeostasis: rapid loss of internal stability with potentially fatal consequences. For example, if the death of a small area of heart tissue triggers a heart attack (myocardial infarction), the heart pumps an inadequate amount of blood.
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www.biologyreference.com/Ho-La/Homeostasis.html
www.biologyreference.com/Ho-La/Homeostasis.html
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This has a de-stabilizing effect, so it does not result in homeostasis. Positive feedback is used in certain situations where rapid change is desirable (see Positive Feedback for an example).
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www.ecsu.ctstateu.edu/personal/faculty/saull/sect9/reso...
www.ecsu.ctstateu.edu/personal/faculty/saull/sect9/resous9/cartos9/homeos9.html
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Homeostasis (a Greek term meaning same state), is the maintenance of constant conditions in the internal environment of the body despite large swings in the external environment. ... Positive feedback loop...
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science.jrank.org/pages/3365/Homeostasis.html
science.jrank.org/pages/3365/Homeostasis.html
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The organs and tissues which act to maintain homeostasis are termed control systems. ... In contrast to negative feedback, positive feedback is relatively uncommon in the human body. In positive feedback a change in the homeostatic condition is detected by receptors and the information is transmitted to the control center.
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dept.kent.edu/biology/courses/60495/homeo.htm
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Therefore the products of the antecedent chemical reactions are consumed and the equilibrium of each reaction is dislocated towards the production of more enzymes (a positive feedback). Homeostasis review done? Go to physiology main page and choose another subject...
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www.biology-questions-and-answers.com/homeostasis.html
www.biology-questions-and-answers.com/homeostasis.html
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HOMEOSTASIS AND POSITIVE FEEDBACK ... · positive feedback systems are less common in types of homeostasis ... positive feedback systems reinforce any changes – they move the controlled variable even further away from a steady state, causing a discrete physiological event to be accomplished rapidly...
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www.clickandlearn.org/Bio/Homeostasis.htm
www.clickandlearn.org/Bio/Homeostasis.htm
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REGULATION - IT'S ALL ABOUT HOMEOSTASIS ... Positive feedback is the opposite of negative feedback in that encourages a physiological process or amplifies the action of a system. Positive feedback is a cyclic process that can continue to amplify your body's response to a stimulus until a negative feedback response takes over.
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www.biology4kids.com/files/systems_regulation.html
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Positive feedback leads to divergent behavior: indefinite expansion or explosion (a running away toward infinity) or total blocking of activities (a running away toward zero). Each plus involves another plus; there is a snowball effect.
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pespmc1.vub.ac.be/FEEDBACK.html
pespmc1.vub.ac.be/FEEDBACK.html
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