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GATE 2021 BM – Question 55

Mammalian Cell Biology, Human Anatomy and Physiology · Musculoskeletal System · 2 marks · Multiple select

Which statements about smooth muscle are true?

  1. It is present in walls of hollow organs
  2. It is controlled by the autonomic nervous system
  3. Its cells are nonstriated
  4. Its cells are striated

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Correct answer: (A) It is present in walls of hollow organs; (B) It is controlled by the autonomic nervous system; (C) Its cells are nonstriated

Explanation

Smooth muscle forms contractile walls of structures such as vessels and the gastrointestinal tract, is regulated by autonomic and local/hormonal signals, and lacks the visible sarcomeric striations of skeletal/cardiac muscle. Hence A,B,C are correct and D is false.

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