Which of the choices below explains why the arterioles are known as resistance vessels?
A. Their prime function is the exchange of nutrients and wastes between the blood and tissue cells.
B. The contraction and relaxation of the smooth muscle in their walls can change their diameter.
C. They distribute blood to various parts of the body.
D. They contain a large quantity of elastic tissue.
Answer:B
Which of the choices below explains why the arterioles are known as resistance vessels?
A. Their prime function is the exchange of nutrients and wastes between the blood and tissue cells. B. The contraction and relaxation of the smooth muscle in their walls can change their diameter. C. They distribute blood to various parts of the body. D. They contain a large quantity of elastic tissue.