What is the major function of the arterioles
A)to regulate flow of blood through capillary beds
B)to distribute cardiac output to large blood vessels
C)to serve as a pressure reservoir
D)to regulate heart rate

Question

Quizplus · Accepted Answer

Arterioles are small arteries that regulate blood flow into capillary beds. Their major function is to constrict or dilate to adjust the amount of blood flow to the tissues depending on their metabolic needs. Therefore, option A is the correct answer. Option B is incorrect because arterioles do not distribute cardiac output directly. Option C is incorrect because the pressure reservoir function is mainly carried out by large elastic arteries like the aorta. Option D is also incorrect because heart rate regulation is primarily controlled by the autonomic nervous system and hormones, not the arterioles.

What Is the Major Function of the Arterioles