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STD 11 - 14. Breathing and exchange in gases — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 14. Breathing and exchange in gases1 Mark
MCQ
Which muscles help us to increase the strength of inspiration and expiration?
  • A
    Cardiac muscles
  • B
    Abdominal muscles
  • C
    Internal intercostal muscles
  • ✓
    Both $(b)\, \& \,(c)$
✓

Answer

Correct option: D.
Both $(b)\, \& \,(c)$
d
Cardiac muscle i.e., muscle of heart, it do not have any role in inspiration and expiration.
Rest two muscles i.e., abdominal and internal intercostal muscle undergo contraction and increase the strength of expiration.

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