_______ are the Smallest Branches of an Artery and Are

Question

_______ are the smallest branches of an artery and are important in regulating blood pressure.
A) Venules
B) Capillaries
C) Arterioles
D) Micro-arteries

Accepted Answer

Arterioles are the smallest branches of an artery and have a significant role in regulating blood pressure through vasoconstriction and vasodilation. Venules are small veins that collect blood from capillaries while capillaries are thin-walled vessels responsible for exchanging nutrients and waste products between blood and tissues. Micro-arteries are not a commonly used term in anatomy and physiology.