Which of the following vessels has the greatest ability to change diameter?
A) Arteriole
B) Capillary
C) Systemic artery
D) Aorta

Question

Quizplus · Accepted Answer

Arterioles are the smallest branches of arteries and can change their diameter to regulate blood flow and blood pressure, making them the vessel with the greatest ability to change diameter. Capillaries have a very small diameter and cannot change diameter significantly. Systemic arteries and the aorta have thicker walls and do not have as great of a ability to change diameter compared to arterioles.

Which of the Following Vessels Has the Greatest Ability to Change