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

Question

Quizplus · Accepted Answer

Skin vasoconstriction reduces blood flow and heat loss to the skin's surface, conserving heat in the core of the body. Skin vasodilation, on the other hand, increases blood flow and heat loss, and forming "goosebumps" has negligible effects on heat conservation. Increasing the temperature gradient between the skin and the environment is not a physiological response and would be difficult to achieve without external help (e.g., adding insulation).

Which of These Actions Is the Major Means of Decreasing