All of the following are functions of smooth muscles except: a. heartbeat b. breathing c. perspiration d. digestion select the best answer from the choices provided. a b c d

Smooth muscles are defined as involuntary and non-striated muscles. Walls of the stomach, blood vessels, and ureters are made up of smooth muscles.

The correct option is:

Option A. heartbeat

Functions of the smooth muscles are:

1. Smooth muscles line the walls of the stomach and digestive tract. It helps in the movement of food during the process of digestion.

2. The folds and projections in the intestine are made by smooth muscles. It helps in the better absorbent of the nutrients.

3. Smooth muscles also line the airway, which functions to protect the airways from distortion during the process of breathing.

4. The cardiac muscles are the type of muscles that are involuntary and control the functioning of the heart and heartbeat.

Thus, the correct option is Option A.

To know more about smooth muscles, refer to the following link:

link

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