If the PCO 2 of alveolar air was 50 mmHg and the PCO 2 of the blood entering the pulmonary capillaries was 46 mmHg, how will CO 2 move as the blood flows through the lungs?
A.
CO 2 would move from the alveoli into the pulmonary capillary
B.
CO 2 would move from the pulmonary capillary into the alveoli