Question

if one hold his breath after expiration 60 seconds would there be still ocuring any exchange of respiratory gases in the lung during this period .explain.

Answer 1

No.There won't be exchange of any gases, as the gas exchange will be finished within 60 seconds.
In the lungs where the gases are exchanged,There is enough space for certain volume of gases.So The alveoli present in the lungs would make the process sooner.So the respiration process can't occur after the time limit.