Question 1
An early sign of plaque formation in coronary arteries is
◦ a heart attack.
◦ hypertension.
◦ hypotension.
◦ angina pectoris.
◦ rapid heart beat.
Question 2
At the arteriole end of the capillary, precapillary sphincters
◦ force blood back into arteries.
◦ control blood flow into capillaries.
◦ control blood flow into venules.
◦ connect arterioles to venules.
◦ force blood back into veins.