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Which of the following muscles contract during inspiration?
Option: 1
External intercostal muscles
Option: 2
Internal intercostal muscles
Option: 3
Both a and b
Option: 4
None of the above
Answers (1)
During inspiration, the external intercostal muscles flex, elevating the ribs and sternum and expanding the thoracic cavity.
Option 1 is the correct answer.
View full answer
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