In vasoconstriction, the layer of the arteriole or small artery that contracts is the
A) Tunica adventitia
B) Tunica media
C) Tunica intima
D) Endothelial cell layer
E) External elastic lamina

Question

Quizplus · Accepted Answer

The tunica media, which is the middle layer of the walls of arteries and arterioles, contains smooth muscle cells that contract during vasoconstriction, narrowing the vessel diameter.

In Vasoconstriction, the Layer of the Arteriole or Small Artery