The posterior hypothalamus helps control temperature by
a. Causing vasoconstriction.
b. Shunting blood to the skin and extremities.
c. Increasing sweat production.
d. Causing vasodilation.
ANS: A
If the posterior hypothalamus senses that the body's temperature is lower than the set point, the body initiates heat conservation mechanisms. Vasoconstriction of blood vessels reduces blood flow to the skin and extremities. The anterior hypothalamus controls heat loss by inducing sweating, vasodilation of blood vessels, and inhibition of heat production.
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