A Negative Feedback Loop or Negative Feedback Mechanism is our body’s response to maintain homeostasis – the relatively constant condition of our internal environment. When the body is exposed to heat, for example, it will signal the hypothalamus to control the sympathetic nervous system to promote vasodilation thus making the body sweat. Sweating will then create a cooling response thus lowering down the body temperature signalling back the hypothalamus to promote vasoconstriction. In this way, the body’s normal core temperature (which ranges from 36.5°C to 37.5°C) is maintained.
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