Smooth muscles are long and spindle-shaped with _ nucleus per cell:
Correct answer: A. One
- A. One
- B. Two
- C. Three
- D. Many....
Explanation
Smooth muscle cells are spindle shaped, have a single, centrally located nucleus, and lack striations. They are called involuntary muscles.
This question appeared on the NUMS 2022 paper, which you can sit online with every answer explained.
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About Muscles
Muscles covers skeletal, smooth and cardiac muscle, their microscopic structure and the roles of tendons, myofibrils, actin and myosin. It explains the sliding filament mechanism, sarcomere shortening, neuromuscular transmission and calcium regulation, while distinguishing voluntary skeletal movement from involuntary contraction in smooth and cardiac muscle.
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