When the temperature of the preoptic area of the hypothalamus exceeds its thermostat setting,
A) peripheral vasoconstriction occurs.
B) skin blood flow increases.
C) rate and depth of respiration decreases.
D) sweat glands are inhibited.
E) blood is shunted to deep veins.

Question

Quizplus · Accepted Answer

When the temperature of the preoptic area of the hypothalamus exceeds its thermostat setting, skin blood flow increases as a means of dissipating heat and returning the body to its normal temperature range. This is known as vasodilation.

When the Temperature of the Preoptic Area of the Hypothalamus