Question

multiple choice question
the small arteries called ______ are capable of vasoconstriction and vasodilation.
-
o capillaries
o venules
o elastic arteries
o arterioles

Explanation:

Arterioles are small - diameter arteries that can regulate blood flow by vasoconstriction and vasodilation. Capillaries are for gas and nutrient exchange, venules collect blood from capillaries, and elastic arteries are large - diameter arteries that help maintain blood pressure.

Answer:

D. arterioles