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Which of the following changes occur in diaphragm and intercostal muscles when expiration of air takes place?

Option: 1

Internal intercostal muscles relax and diaphragm contracts.


Option: 2

External intercostal muscles and diaphragm relax


Option: 3

Internal intercostal muscles contract and diaphragm relaxes


Option: 4

External intercostal muscles and diaphragm contract


Answers (1)

best_answer

 

Role of Diaphragm in breathing -

The diaphragm and a specialised set of muscles – external and internal intercostals between the ribs, help in generation of such gradients.

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 Correct option is 3

 

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Pankaj

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