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11 Cards in this Set
- Front
- Back
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Define Homeostasis |
The regulation of the conditions inside your body (and cells) to maintain a stable envirnoment in respone to both internal and external conditions |
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What is an effector? |
Either a muscle or gland which reponds to nervous impulses |
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Define coordination centre |
An organ (e.g. brain, spinal cord or pancreas) that processes information from the receptor and organises a response for the effector |
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What is negative feedback? |
A mechanism that restores a level back to optimum in a system |
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Define optimum level |
A level of something (e.g. water, ions or glucose) that enables the body to work at it's best |
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What is a stimulus? |
A change in the environment |
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What is a control system? |
Control systems regulate your internal environment-these include both nervous and hormonal (chemical) communication systems. |
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Give 3 examples of conditions in your internal environment that need regualting and maintaining |
Body temperature Water content in the body Blood gluscose content |
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Name the part of an automatic control system that recieves information about a stimulus and organises a response |
Coordination centre |
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The water content of the body is monitored by a control system. If it gets too low, a negative feedback mechanism is triggered. Briefly outline the stages in this negative feedback system |
The receptors detect that the water content of the body is too low. They send this information to the coordination centre, which processes the information and organises a response for the effectors. The effectors respond to counteract the change by bringing the water content back to it's optimum level |
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Negative feedback mechanism |
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