Multiple Choice
Oxygen moves from alveoli to the bloodstream ____.
A) because the concentration of oxygen is greater in alveoli than in the blood
B) mainly due to the activity of carbonic anhydrase in the red blood cells
C) against a concentration gradient
D) to equal the concentration of CO₂ in the blood
E) by active transport
Correct Answer:
Verified
Correct Answer:
Verified
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