Question

question 18
which of the following is a normal response for skin in a cold environment?
a vasoconstriction of vessels to the skin
b sweat glands become more active
c vasodilation of blood vessels to the skin
d all are normal responses

Explanation:

In a cold environment, the body tries to conserve heat. Vasoconstriction (narrowing of blood vessels) reduces blood flow to the skin, minimizing heat loss. Sweat glands become less active (not more) as sweating is for cooling. Vasodilation (widening of blood vessels) would increase heat loss, which is not needed in cold. So only vasoconstriction is a normal response.

Answer:

A. vasoconstriction of vessels to the skin