★ Respiratory System Quiz
What is incorrect about gas exchange?
A. Alveolar air is rich in oxygen and poor in carbon dioxide
B. Gas exchange takes place by diffusion
C. Blood that reaches the capillaries surrounding the alveoli is rich in oxygen and poor in carbon dioxide
D. Oxygen diffuses from the alveoli into the red blood cells in the capillaries and carbon dioxide diffuses into the alveoli
Select your answer:
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