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  • Which of the following muscles contracts to pull the ribs outwards during inspiration?  Option: 1 Sternocleidomast

Which of the following muscles contracts to pull the ribs outwards during inspiration?

 

Option: 1

Sternocleidomastoid


Option: 2

Pectoralis minor


Option: 3

Both a and b

 


Option: 4

None of the above


Answers (1)

best_answer

The pectoralis minor muscle contracts during inspiration to pull the ribs outwards and increase the volume of the thoracic cavity. 

Option 2 is the correct answer.

Posted by

Suraj Bhandari

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