Question

which blood vessel is considered the least compliant? a artery b arteriole c venule d vein

Explanation:

Compliance of blood vessels refers to their ability to stretch. Arterioles have a thick muscular layer and less elastic tissue, making them less compliant (harder to stretch) compared to arteries, venules, and veins. Arteries have more elasticity, veins and venules are more compliant (can hold more blood with pressure changes). So arterioles are the least compliant.

Answer:

B. Arteriole