Card 22 / 36: The partial pressure of carbon dioxide is 45 mm Hg in the blood and 40 mm Hg in the alveoli. What happens to the carbon dioxide?
A)
It diffuses into the blood.
B)
It diffuses into the alveoli.
C)
The gradient is too small for carbon dioxide to diffuse.
D)
It decomposes into carbon and oxygen.
Answer:
B) It diffuses into the alveoli.
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