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UNDERSTANDING FEEDBACK MECHANISMS and HOMEOSTASIS

UNDERSTANDING FEEDBACK MECHANISMS and HOMEOSTASIS. BY: Coach Lee. What is homeostasis?. maintenance of a stable internal state within an organism. What is feedback?. Is a mechanism that will maintain homeostasis. Example of feedback mechanism in animals. Temperature homeostasis:

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UNDERSTANDING FEEDBACK MECHANISMS and HOMEOSTASIS

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  1. UNDERSTANDING FEEDBACK MECHANISMS and HOMEOSTASIS BY: Coach Lee

  2. What is homeostasis? • maintenance of a stable internal state within an organism.

  3. What is feedback? • Is a mechanism that will maintain homeostasis.

  4. Example of feedback mechanism in animals. • Temperature homeostasis: • Your body gets hot, so we sweat • Your body sweats, it evaporates and we cool back off. • Heart rate homeostasis: • You increase the rate of excerisce • Then your heart rate increases to compensate for necessary oxygen levels and blood flow

  5. Example of feedback mechanisms in plants: • plants need to regulate water loss and carbon dioxide intake for photosynthesis and other life activities

  6. Feedback in plants • when plants do not keep enough water in their cells, they wilt and die • guard cells: open and close the stomate • the ability of the guard cell to close during periods of limited water availability for the plant allows the plant to maintain water homeostasis

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