HOMEOSTASIS AND FEEDBACK CONTROL pp 1041-1042.

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HOMEOSTASIS AND FEEDBACK CONTROL pp

Homeostasis: maintaining stable internal environment Bringing body back to normal The sympathetic and parasympathetic divisions of the autonomic system function in opposition to each other for “flight or fight” response HOMEOSTASIS

Last step of the series controls the first FEEDBACK MECHANISMS

Negative feedback: the product (response) stops production of the initial stimulus EX. Thermoregulation (sweating and shivering) NEGATIVE FEEDBACK

POSITIVE FEEDBACK The product stimulates production of the initial stimulating substance or action (i.e. contractions during labor)

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