Distributing arteries that maintain vascular tone are which type of arteries?

Distributing arteries that maintain vascular tone are which type of arteries?

• A. Medium muscular arteries
• B. Small arteries
• C. Elastic arteries
• D. Veins

Answer: (A)

Muscular arteries act as distributing vessels, with a thick tunica media rich in smooth muscle that lets them actively regulate their diameter. This ability to constrict or dilate controls how much blood reaches specific organs and helps maintain overall vascular tone and systemic blood pressure. Elastic arteries, by contrast, are primarily conducting vessels with many elastic fibers that dampen pulse waves rather than regulate flow; veins are capacitance vessels with thinner walls; small arteries are more about resistance but the classic distributing vessels are the medium muscular arteries.

Muscular arteries act as distributing vessels, with a thick tunica media rich in smooth muscle that lets them actively regulate their diameter. This ability to constrict or dilate controls how much blood reaches specific organs and helps maintain overall vascular tone and systemic blood pressure. Elastic arteries, by contrast, are primarily conducting vessels with many elastic fibers that dampen pulse waves rather than regulate flow; veins are capacitance vessels with thinner walls; small arteries are more about resistance but the classic distributing vessels are the medium muscular arteries.