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Which of the following is an example of negative feedback loop in humansA. Constriction of skin blood vessels and contraction of skeletal muscles when it is too coldB. Secretion of tears after falling of sand particles into the eyeC. Salivation of mouth at the sight of delicious foodD. Secretion of sweat glands and constriction of skin blood vessels when it is too hot |
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Answer» Correct Answer - A (a) Skin blood vessels constrict and skeletal muscles contract due to the cold is an example of negative feedback mechanism of homeostasis. |
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