Question

when one walks into a cold room, exposed skin will experience _________.
a dermal vasoconstriction
b dermal vasodilation
c epidermal vasoconstriction
d increased sweat gland activity

Explanation:

When in a cold environment, the body tries to conserve heat. Dermal blood vessels constrict (vasoconstriction) to reduce heat loss from the skin surface. The epidermis has no blood vessels for vasoconstriction. Vasodilation increases heat loss and increased sweat gland activity is related to cooling in hot conditions, not cold - related responses.

Answer:

A. dermal vasoconstriction