The major means of decreasing heat loss in response to a cold environmental temperature is
A)skin vasoconstriction
B)skin vasodilation
C)increasing the temperature gradient between the skin and environment
D)formation of "goose bumps"
E)both a and d

Question

Quizplus · Accepted Answer

Skin vasoconstriction is the major means of decreasing heat loss in response to a cold environmental temperature. When the body senses cold, the blood vessels in the skin constrict, reducing blood flow and heat loss to the environment. This helps to maintain core body temperature. Option D, formation of "goose bumps," is a reflex response that occurs as a result of vasoconstriction, but it is not a major means of decreasing heat loss. Option B is not correct as skin vasodilation would actually increase heat loss. Option C may help to maintain body temperature in a cold environment, but it is not a major means of decreasing heat loss.

The Major Means of Decreasing Heat Loss in Response to a Cold