Intrapulmonary shunting occurs when:
A. blood returning to the left side of the heart is low in carbon dioxide.
B. nonfunctional alveoli inhibit the diffusion of oxygen and carbon dioxide.
C. a blockage in the pulmonary artery prevents blood from reaching the lungs.
D. blood entering the lungs from the right side of the heart is hyperoxygenated.
Answer: B. nonfunctional alveoli inhibit the diffusion of oxygen and carbon dioxide.
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