Drugs Called Calcium Channel Blockers May Be Used to Lower

Drugs called calcium channel blockers may be used to lower blood pressure by causing arteries to vasodilate.These drugs

A) prevent calcium from entering the sarcoplasmic reticulum of smooth muscle.
B) stimulate the calcium pump in smooth muscle, thus removing calcium from the calmodulin.
C) prevent calcium from exiting the sarcoplasmic reticulum in skeletal muscle.
D) prevent calcium from entering cardiac muscle, thus slowing down the heart rate.
E) prevent calcium from entering smooth muscle, thus allowing the muscle to relax.