The amount of carbonic acid is lower in the pulmonary vein than it is in the pulmonary artery.

Question

Quizplus · Accepted Answer

This is because in the lungs, carbon dioxide diffuses out of the blood into the air sacs and oxygen diffuses into the blood from the air sacs during respiration. This decreases the amount of carbon dioxide in the blood, which decreases the amount of carbonic acid in the blood. As a result, the pH of the blood increases and the amount of bicarbonate ions increases.

The Amount of Carbonic Acid Is Lower in the Pulmonary