Which of the following statements is true? a. the partial pressure of carbon dioxide is greater in alveoli than in pulmonary arterial blood b. the partial pressure of oxygen is greater in tissue fluid than in systemic arterial blood c. the partial pressure of oxygen is the same in the pulmonary veins as in the aorta d. the partial pressure of oxygen in the atmosphere is always the same as alveolar oxygen partial pressure
1) the partial pressure of carbon dioxide is greater in alveoli than in pulmonary arterial blood
2) the partial pressure of oxygen is greater in tissue fluid than in systemic arterial blood
3) the partial pressure of oxygen is the same in the pulmonary veins as in the aorta
4) the partial pressure of oxygen in the atmosphere is always the same as alveolar oxygen partial pressure
