The Breaking Open of Alveoli in People with Emphysema Decreases

question 18

Multiple Choice

The breaking open of alveoli in people with emphysema decreases their rate of gas exchange because

• A)the distance between the air they breathe in and the blood is decreased.
• B)there is less pressure in the lungs to force the oxygen to dissolve in the blood.
• C)the concentration of oxygen in the lungs becomes much greater than that in the blood.
• D)their lungs have less surface area available for diffusion.

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