It could be stated that smooth muscles are the voluntary muscles. They evolve the control of the following functions: <span>breathing, digestion, perspiration, and urination. So option A heartbeat does not belong to this group. In fact it belongs to the cardiac muscles which are involuntary. </span>
Smooth muscles are the muscles which cells do not have striations. Hollow organs are covered with smooth muscles. These include: the urinary bladder, uterus, stomach, intestines, the arteries and veins,
All of the following are functions of smooth muscles EXCEPT heartbeat. Correct answer: A
The heart has cardiac muscle in its walls. So it follows that the heartbeat is not function of smooth muscles.
Protein digestion would be more difficult because of that buffering action of sodium bicarbonate on the stomach acid, which alters the optimum pH for the action of pepsin, a major protein-digester
