Blood in the Pulmonary Artery Has a Higher PH Than

Question

Blood in the pulmonary artery has a higher pH than blood in the pulmonary vein.

Accepted Answer

Blood in the pulmonary artery has a lower pH than blood in the pulmonary vein. This is because the pulmonary artery carries deoxygenated blood from the heart to the lungs, where it picks up oxygen and releases carbon dioxide. Carbon dioxide is an acidic compound, so the blood in the pulmonary artery will have a slightly lower pH due to the presence of CO2. As it flows through the lungs and becomes oxygenated, the pH of the blood in the pulmonary vein increases.