Tag: chemical coordination and integration

Questions Related to chemical coordination and integration

An example of negative feed back loop in humans is 

biology chemical coordination and integration mechanism of hormone action coordination in human beings- chemical control endocrine system in humans

  1. Salivation of mouth at the sight of delicious food.

  2. Constriction of skin blood vessels and contraction of skeletal muscles in cold.

  3. Secretion of tears on dust particles falling in eyes.

  4. Secretion of sweat glands and constriction of skin blood vessels when it is too hot.

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Correct Option: B
Explanation:
  • Negative feedback is a reaction that causes a decrease in function. It occurs in response to some kind of stimulus. Often it causes the output of a system to be lessened; so, the feedback tends to stabilize the system. This can be referred to as homeostasis. For example, constriction of skin blood vessels and contraction of skeletal muscles in cold.
  • So, the correct answer is 'Constriction of skin blood vessels and contraction of skeletal muscles in cold'.