Which of These Statements Applies to Vasoconstriction of the Blood

Multiple Choice

Which of these statements applies to vasoconstriction of the blood vessels to the skin

A) It is not coordinated by the sympathetic nervous system.
B) It increases heat exchange with the environment.
C) It occurs when core body temperature is elevated.
D) Heat exchange with the environment is lowered and is coordinated by the sympathetic nervous system.