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homeostasis
| Question | Answer |
|---|---|
| define homeostasis | the ability of an organism to maintain a constant internal environment |
| what does external environment refer to | the surroundings in which an organism lives |
| what does internal environment refer to | the surroundings of the cells in a multicellular organism |
| how do cells exchange materials with their environment | by osmosis , diffusion and active transport |
| why are special organs of exchange not needed in small organisms | because diffusion is adequate |
| what special features do large organisms require to improve their rate of exchange | flat structures, a respiratory system with a large surface area , respiratory and excretory systems |
| why do large organs require a circulatory system | to carry materials over long distances |
| what does homeostasis allow for | cells and therefore organisms to function at their most efficient rate, organisms to function independently of external conditions, slight changes in internal conditions when necessary |
Created by:
caoimhefraher
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