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Which of the following statements about the mechanism of inspiration is true?

 

Option: 1

The diaphragm contracts to pull the ribs and sternum outwards


Option: 2

The external intercostal muscles contract to increase the pressure in the lungs


Option: 3

The volume of the thoracic cavity increases during inspiration

 


Option: 4

None of the above


Answers (1)

best_answer

During inspiration, the volume of the thoracic cavity increases, which allows air to flow into the lungs.

Option 3 is the correct answer.

Posted by

Kuldeep Maurya

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