A Person Inspires Dry Air

question 18

Multiple Choice

A person inspires dry air. The N₂ partial pressure in moist tracheal air should be

• A) The same as in dry inspired air because N2 does not exchange
• B) The same as in dry inspired air because the water vapor merely increases the total
• pressure
• C) Less than that in dry inspired air because water vapor dilutes all of the gasses
• D) More than that in dry inspired air because oxygen is rem oved from the tracheal air
• E) Unaffected by anything because N₂ is inert to bodily metabolism

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