In Blood Arriving at an Alveolus, the Concentration Of

Question

In blood arriving at an alveolus, the concentration of
A)oxygen is lower in the alveolus than in the blood.
B)carbon dioxide is higher in the alveolus than in the blood.
C)carbon dioxide is higher in the blood than in the alveolus.
D)carbon dioxide in the blood is equal to the concentration of oxygen in the alveolus.

Accepted Answer

In blood arriving at an alveolus, carbon dioxide concentration is higher in the blood than in the alveolus, allowing CO2 to diffuse out of the blood and into the alveolus for exhalation.