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  3. If one holds his breath after expiration for about 30 sec.would there still be occurring any exchange of respiratory gases in the lungs during this pe

. If one holds his breath after expiration for about 30 sec.would there still be occurring any exchange of respiratory gases in the lungs during this pe

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Ans: Yes, because even after forceful expiration, some residual volume of air remains in the alveoli which can cause exchange of respiratory gases in the lungs

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