B3.3 - Homeostasis

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Biology

GCSE Biology

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4 Terms

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Homeostasis

The maintenance of a constant internal environment in response to changes internally and externally

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Organs of homeostasis

Brain, lungs, muscles, pancreas, skin, kidneys

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Thermoregulation risks

  • Normal BT is 37C - optimum temp. for enzymes

  • Low BT - slower reactions, and hypothermia

  • High BT - enzymes denature, heat stroke, dehydration

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How does thermoregulation occur?

  • Hypothalamus is thermoregulatory centre

  • Hypothalamus recieves information from skin receptor cells (ext temp) & internal receptor cells (int temp)