Question

all of the following are functions of smooth muscles except:
a. heartbeat
b. breathing
c. perspiration
d. digestion

please select the best answer from the choices provided.

○ a
○ b
○ c
○ d

Explanation:

Smooth muscles are involuntary and found in organs, blood vessels, etc. Heartbeat is controlled by cardiac muscle (not smooth). Breathing (bronchial smooth muscle), perspiration (smooth muscle in sweat glands), and digestion (smooth muscle in digestive tract) involve smooth muscles. So heartbeat is not a smooth muscle function.

Answer:

A. heartbeat