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Practice MCAT Question - Q89 - Answer!

Which of the following responses would be expected to occur under the same temperature conditions?

A.  Shivering and dilation of superficial blood vessels
B.  Sweating and constriction of superficial blood vessels
C.  Both A and B
D.  Neither A nor B

The correct answer is (D). When the body is too cold, we shiver and our superficial blood vessels constrict to save heat. When the body is too warm, we sweat and our superficial blood vessels dilate to lose heat more efficiently.

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