Q.
Which of these muscles are not involved in normal inspiration, normal expiration as well as forceful inspiration?
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NTA AbhyasNTA Abhyas 2020Breathing and Exchange of Gases
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Solution:
The contraction of external intercostal muscles and diaphragm is responsible for normal inspiration as well as forceful inspiration. Relaxation of these muscles causes normal expiration. The contraction of internal intercostal muscles is responsible for forceful expiration.