21
Question
Which of the following muscles contract during heavy breathing during strenuous exercise?
Which of the following muscles contract during heavy breathing during strenuous exercise?
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Solution
The correct option is C Internal intercostal muscles and abdominal muscles
During normal inspiration, diaphragm contracts, thus increasing the volume of the thoracic cavity in the longitudinal direction. The external intercostal muscles contract, thus increasing the volume of thoracic cavity in the dorsoventral direction.
During normal expiration, the external intercostal muscles and diaphragm relax. There is no such contraction of any muscle.
During emergency situations or vigorous exercise, the internal intercostal muscles and abdominal muscles contract.
During normal inspiration, diaphragm contracts, thus increasing the volume of the thoracic cavity in the longitudinal direction. The external intercostal muscles contract, thus increasing the volume of thoracic cavity in the dorsoventral direction.
During normal expiration, the external intercostal muscles and diaphragm relax. There is no such contraction of any muscle.
During emergency situations or vigorous exercise, the internal intercostal muscles and abdominal muscles contract.
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