Smooth muscle in the arteriole walls can vasoconstrict or vasodilate, which:
A) helps to regulate blood pressure.
B) helps to accelerate the flow of blood through the vessels.
C) prevents the back flow of blood into the tissues.
D) squeezes oxygen out of the blood.
E) adds strength to the blood vessels.

Question

Quizplus · Accepted Answer

Vasoconstriction and vasodilation in the arteriole walls are mechanisms that help regulate blood pressure by altering the diameter of the blood vessels, thereby affecting the resistance to blood flow and the distribution of blood in the body.

Smooth Muscle in the Arteriole Walls Can Vasoconstrict or Vasodilate