Which of the Following is Not a Function of Smooth

Question

Which of the following is not a function of smooth muscle tissue?
A) altering the diameter of the respiratory passageways
B) elevating hairs on the arm
C) forcing blood from the heart into the major arteries
D) moving food materials along the digestive tract
E) forcing urine out of the urinary tract

Accepted Answer

Forcing blood from the heart into the major arteries is a function of cardiac muscle, not smooth muscle. Smooth muscle is involved in functions like altering the diameter of respiratory passageways, moving food along the digestive tract, and forcing urine out of the urinary tract, but the heart's pumping action is due to cardiac muscle.