Which of the following occurs in the lungs?
A) Air loses all of its oxygen.
B) As oxygen-poor blood travels through the lungs, it releases all of its carbon dioxide.
C) Gases move by bulk flow into and out of the blood.
D) Some of the oxygen in the air moves into the blood, and some of the carbon dioxide in the blood moves into the air.
E) Oxygen and carbon dioxide move from a lower concentration to a higher concentration.
Correct Answer:
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