BIOLOGY MODULE 5: COMMUNICATION AND HOMEOSTASIS

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Receptors
- detect stimuli - are specific, so only detect one particular stimulus - can be whole cells and proteins on cell surface membranes
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Effectors
- bring about a response to a stimulus - can be muscle cells and cells found in glands
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Cell Signalling
- happens when receptors need to communicate with effectors - can occur between adjacent cells or between distant cells - cell-surface receptors allow cells to recognise the chemicals involved in cell signalling
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Homeostasis
- involves control systems that keep your internal environment constant within certain limits - vital for cells to function normally and to stop them being damaged
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Negative Feedback
- receptors detect when a level is too high or too low - this information is communicated to the effectors - the effectors respond to counteract the change, bringing the level back to normal
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Other cards in this set

Card 2

Front

- bring about a response to a stimulus - can be muscle cells and cells found in glands

Back

Effectors

Card 3

Front

- happens when receptors need to communicate with effectors - can occur between adjacent cells or between distant cells - cell-surface receptors allow cells to recognise the chemicals involved in cell signalling

Back

Preview of the back of card 3

Card 4

Front

- involves control systems that keep your internal environment constant within certain limits - vital for cells to function normally and to stop them being damaged

Back

Preview of the back of card 4

Card 5

Front

- receptors detect when a level is too high or too low - this information is communicated to the effectors - the effectors respond to counteract the change, bringing the level back to normal

Back

Preview of the back of card 5

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