Question

multiple choice question
from the following list, indicate the smallest vessel capable of vasodilation and vasoconstriction.
o arteriole
o artery
o capillary

Explanation:

Arteries are large - diameter vessels. Capillaries are the smallest blood vessels but lack smooth muscle for vasodilation and vasoconstriction. Arterioles are small - diameter vessels with smooth muscle that can perform vasodilation and vasoconstriction.

Answer:

A. Arteriole