In late adults, the amount of air left in the lungs after expiration of the maximum amount of air:
A. remains unchanged because the lungs have become accustomed to years of breathing pollution.
B. increases, which hampers diffusion of gases because of stagnant air that remains in the alveoli.
C. decreases, which increases diffusion in the lungs and causes an accumulation of carbon dioxide.
D. decreases, resulting in widespread collapsing of the alveoli and impaired diffusion of gases.
Ans: B. increases, which hampers diffusion of gases because of stagnant air that remains in the alveoli.
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