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| Animals are not CLOSED systems. meaning... |
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| They exchange materials with the outside environment. |
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| Simple animals, with gastro cavities and exposed cells do _____ exchange. |
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| Most other animals have small outer surfaces and rely on specialized inner surfaces to exchange materials. this is ___ exchange. |
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| A physiologist that noted many animals maintain a constant internal environment. |
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| Homeostasis maintains the body in a dynamic equilibrium ( within a range). |
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| Homeostatic control has 3 functional components |
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| receptor( sensor) control centre, and effector. |
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| There are 2 types of control circuits for homeostasis |
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| negative feedback ( body temp, blood sugar) " the change is counteracted". Also, positive feedback where the change is augmented ( make something greater)( childbirth). |
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