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

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

To understand why this statement is incorrect (and thus the correct answer to the question), let us analyze the characteristics of smooth muscle cells and compare them with other muscle types:

1. Striations: Smooth muscle cells do not possess the cross-striations (alternating light and dark bands) characteristic of skeletal and cardiac muscles. This is because their actin and myosin filaments are not organized into regular repeating units called sarcomeres. Hence, the statement "These muscle have no striations" is correct.

2. Control: Smooth muscles are controlled by the autonomic nervous system and hormones, meaning their contraction cannot be consciously controlled. Hence, they are involuntary muscles, making the statement "They are involuntary muscles" correct.

3. Location: Smooth muscle is located in the walls of hollow visceral organs, including the urinary bladder, uterus, gastrointestinal tract, and blood vessels (where they help regulate blood pressure and flow). Thus, the statement "These muscles are present in the wall of blood vessels" is correct.

4. Cell Communication: Intercalated discs are specialized microscopic structures that anchor cardiac muscle cells together and contain gap junctions for rapid electrical communication. These are unique, defining features of cardiac muscle, not smooth muscle. Smooth muscle cells communicate via simpler gap junctions, but they lack intercalated discs entirely. Therefore, the statement "Communication among the cells is performed by intercalated discs" is incorrect regarding smooth muscle.