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 muscle 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

To determine which statement wrongly represents the nature of smooth muscle, let's analyze each of the provided options based on our understanding of smooth muscle tissue.

1. These muscles are present in the wall of blood vessels:
   This statement is correct. Smooth muscles are indeed present in the walls of blood vessels, as well as in other hollow organs. They play a key role in regulating blood flow and pressure by contracting and relaxing.
2. These muscles have no striations:
   This statement is correct. Smooth muscles are characterized by their lack of striations, which distinguishes them from skeletal and cardiac muscles that have a striated appearance due to their banded structure.
3. They are involuntary muscles:
   This statement is correct. Smooth muscles are controlled involuntarily, meaning their actions are not consciously controlled. They function automatically without conscious input, such as in the digestive tract or blood vessels.
4. Communication among the cells is performed by intercalated discs:
   This statement is incorrect. Intercalated discs are a feature of cardiac muscle, not smooth muscle. These discs facilitate communication and coordination between cardiac muscle cells. Smooth muscles communicate differently, primarily through gap junctions without the requirement for intercalated discs.

Therefore, the correct answer is that the statement "Communication among the cells is performed by intercalated discs" wrongly represents the nature of smooth muscle.