During quiet inhalation, which muscles mainly contract?
Correct answer: B. external intercostal muscles and diaphragm
During quiet inhalation, the external intercostal muscles and diaphragm mainly contract to expand the thoracic cavity.
NCERT Biology Class 11, Chapter 17
During quiet inhalation, which muscles mainly contract? NEET Biology MCQ
Last updated: July 30, 2026
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