Which one of the following is an example...

Which one of the following is an example of negative feedback loop in humans ?

A

Salivation of mouth at the sight of delicious food

B

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

C

Secretion of tears on dust particles falling in eyes.

D

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

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The correct Answer is:

B

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