A: Normal expiration during quiet breathing,u | vedclass

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Question

(A) During quiet breathing,inspiration is an active process that requires the contraction of the diaphragm and external intercostal muscles. Conversel

Vedclass · Accepted Answer

Assertion and Reason both are correct and Reason is the correct explanation of Assertion.

Vedclass · Answer

(A) During quiet breathing,inspiration is an active process that requires the contraction of the diaphragm and external intercostal muscles. Conversely,normal expiration is a passive process. It occurs when the diaphragm and external intercostal muscles relax,allowing the lungs and chest wall to return to their original position due to their inherent elastic recoil. Therefore,both the Assertion and the Reason are correct,and the Reason provides the correct explanation for why expiration is a passive process.

$A$: Normal expiration during quiet breathing,unlike inspiration,is a passive process because no muscular contractions are involved.
$R$: Normal expiration results from the elastic recoil of the chest wall and lungs.

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$A$: Normal expiration during quiet breathing,unlike inspiration,is a passive process because no muscular contractions are involved. $R$: Normal expiration results from the elastic recoil of the chest wall and lungs.