9.20_Homeostasis

9.20_Homeostasis - Homeostasis-Relatively stable...

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Homeostasis -Relatively stable maintenance of a body parameter Homeostasis control system -Collection of interconnected components that keeps a body parameter within limit -If disrupted from baseline, will usually return to baseline. Requires feedback control regulation could be short or long term Steady state (SS) -System not changing but nergy used -NOT equilibrium b/c there is change in energy -balancing/ tradeoffs Feedback occurs if SS is disrupted Negative=opposite of disturbance direction. Return towards SS Positive= continue in disturbance direction. Move further from SS Feedfoward - anticipating regulation Homeostatic control system - most operate in reflex arc -Stimulus- Environmental. Another system in body -Receptor- Senses environmental change -Afferent pathway- “to carry into” -Efferent pathway-“to carry out” -Response- physiological change. What do you need? Communication from nerves and signals Signals - Chemical messengers control system messenger Released by Pathway Communicates with
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This note was uploaded on 04/22/2008 for the course EEOB 232 taught by Professor Bronson during the Spring '07 term at Ohio State.

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9.20_Homeostasis - Homeostasis-Relatively stable...

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