Question

Which of the following statements wrongly represents the nature of smooth muscle?

• A. These muscles are present in the wall of blood vessels
• B. These muscles have no striations
• C. They are involuntary muscles
• D. Communication among the cells is performed by intercalated discs

Answer 1

The correct option is D Communication among the cells is performed by intercalated discs

Muscles are involved in various types of voluntary and involuntary movements of the body.

There are three different types of muscles:

Skeletal muscles/striated muscles, smooth muscles/visceral muscles and cardiac muscles.

Smooth muscles are found in the wall of internal hollow organs such as the blood vessels, alimentary canal and reproductive tract.

Smooth muscles lack striations and hence are called smooth muscles/non striated muscles.

The activities of these muscles are not under the voluntary control of the nervous system. Hence, these muscles are called involuntary muscles.

Intercalated discs are communication junctions found in the cardiac muscles. They allow the cells of the cardiac tissue to contract as a unit. These are characteristic features of cardiac muscles. These are not found in smooth muscles.

Hence, the statement in option d is incorrect.