Smooth Muscles are Primarily Used to ________

Question

Smooth muscles are primarily used to ________.
A) generate heat
B) pump blood through the circulation
C) push fluid and solids along the digestive tract
D) provide voluntary movements to the body
E) pull on bones of the skeleton

Accepted Answer

Smooth muscles are found in the walls of hollow organs such as the digestive tract, urinary bladder, uterus, and blood vessels. Their primary function is to propel substances through these organs via rhythmic contractions, such as pushing food through the digestive tract or urine through the bladder. Therefore, choice C is the best answer. Choices A, B, D, and E are incorrect as smooth muscles don't generate heat, pump blood, provide voluntary movements, or pull on bones of the skeleton.