Which has a higher partial pressure of oxygen: inhaled air or exhaled air?
A) inhaled air, because our lungs absorb some of the oxygen in the air
B) exhaled air, because our lungs absorb some of the oxygen in the air
C) inhaled air, because oxygen is removed from the body by breathing
D) exhaled air, because oxygen is removed from the body by breathing
E) The partial pressures in inhaled and exhaled air are equal because air always contains the same concentration of oxygen.

Question

Quizplus · Accepted Answer

Inhaled air has a higher partial pressure of oxygen because our lungs absorb some of the oxygen from the air we breathe in, reducing the amount of oxygen in the air we exhale.

Which Has a Higher Partial Pressure of Oxygen: Inhaled Air