Which of the Following Statements Are True of the Body's

Which of the following statements are true of the body's responses to a warm or cold environment? (Read carefully and select all of the correct statements.)

A) In a cold environment, arterioles in the dermis dilate to keep the skin warm.
B) In a warm environment, sweat glands secrete more sweat onto the skin surface.
C) In a cold environment, muscle tone decreases to prevent fatigue and waste of energy.
D) In a warm environment, blood flow through the dermis increases.
E) In a cold environment, digestion speeds up to produce more energy in the form of heat.
F) In a warm and humid environment, vasoconstriction is the most efficient mechanism of heat loss.