Question

Smooth muscle fibres are:

• A. Spindle shaped
• B. Unbranched and involuntary
• C. Uninucleate
• D. All of the above

Answer 1

The correct option is D All of the above

Smooth muscles or Visceral muscles are located in the inner walls of hollow visceral organs of the body like the alimentary canal, reproductive tract, etc. Each spindle-shaped smooth muscle fibre contains a single, central nucleus. They do not exhibit any striation and are smooth in appearance. Hence, they are called smooth muscles (non-striated muscles).

Their activities are not under the voluntary control of the nervous system and are therefore known as involuntary muscles.

Hence the correct option is D.