Inhaled air has a higher partial pressure of oxygen than blood in pulmonary capillaries. Therefore, oxygen ____.
A)dissociates from hemoglobin
B)diffuses out of the blood into the air
C)diffuses into the blood from the air
D)moves out of the lungs during exhalation
E)does not cross the respiratory membrane

Question

Quizplus · Accepted Answer

The partial pressure gradient causes oxygen to diffuse from the air in the alveoli into the blood in the pulmonary capillaries.

Inhaled Air Has a Higher Partial Pressure of Oxygen Than