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UNDERSTANDING FEEDBACK MECHANISMS and HOMEOSTASIS BY: Coach Lee.

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Presentation on theme: "UNDERSTANDING FEEDBACK MECHANISMS and HOMEOSTASIS BY: Coach Lee."— Presentation transcript:

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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