Vasoconstriction is the result of the contraction of smooth muscle of the
A)tunica intima.
B)tunica media.
C)tunica externa.
D)tunica lumena.

Question

Quizplus · Accepted Answer

Vasoconstriction is the narrowing of a blood vessel, which is the result of the contraction of smooth muscle cells found in the tunica media layer of the blood vessel wall. The tunica intima is the innermost layer, the tunica externa is the outermost layer, and the tunica lumena is the hollow space within the blood vessel.

Vasoconstriction Is the Result of the Contraction of Smooth Muscle