What does it mean if oxygenated blood leaving the alveolar capillaries has an oxygen partial pressure of 100 mmHg?

B: A pp of 100 mmHg is a way of expressing the concentration of oxygen that is dissolved in blood. Oxygen will continue to move into blood from the alveoli as long as the oxygen concentration in blood is less than that in the alveoli. If ppO 2 in the alveoli is 100 mmHg, then the ppO 2 in the blood will continue to increase until it is equal to that in the alveoli.