HMS, BM EQ-Bank 59 MC

Which statement correctly describes the exchange of gases during exercise?

Carbon dioxide diffuses from high concentration in the blood to low concentration in the alveoli
Oxygen diffuses from low concentration in the alveoli to high concentration in the blood
Carbon dioxide moves from low concentration in the blood to high concentration in the alveoli
Oxygen and carbon dioxide exchange occurs primarily in the bronchioles

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\(A\)

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A is correct: Carbon dioxide diffuses from high concentration in blood to low concentration in alveoli following concentration gradient

Other Options:

B is incorrect: Oxygen diffuses from high concentration in alveoli to low concentration in blood
C is incorrect: Reverses the concentration gradient for carbon dioxide
D is incorrect: Gas exchange occurs primarily in the alveoli, not bronchioles