Which of the following causes a decrease in the PO2 of air as it enters the conducting zone of the lungs?

A) warming of the air
B) decreasing alveolar PO2
C) the consumption of oxygen
D) humidifying the air
E) the increasing PCO2


Answer: D) humidifying the air

Biology & Microbiology

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If a child has blood type AB, he or she could NOT have been produced by which set of parents?

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