Which of the Following Vessels Do Not Have the Ability

Question

Which of the following vessels do not have the ability to constrict and dilate?
A)Arterioles
B)Arteries
C)Capillaries
D)Veins

Accepted Answer

Capillaries do not have smooth muscle layers in their walls and are incapable of constricting or dilating. Arterioles, arteries, and veins have smooth muscle layers in their walls and can constrict and dilate to help regulate blood flow.