A) Old man
B) Old woman
C) Young man
D) Young woman
Correct Answer: A
Solution :
Dead space is the air that is inhaled by the body in breathing, but does not take part in gas exchange. Not all the air in each breath is able to be used for the exchange of oxygen and carbon dioxide. About a third of every resting breath is exhaled exactly as it came into the body. In adults, it is usually in the range of 150 mL.
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