Which of the following changes occur in diaphragm and intercostal muscles when expiration of air takes place?
Internal intercostal muscles relax and diaphragm contracts.
External intercostal muscles and diaphragm relax
Internal intercostal muscles contract and diaphragm relaxes
External intercostal muscles and diaphragm contract
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