Physiology Which of the following is TRUE about paial pressures of alveolar gases? A Alveolar PCO2 is more than mixed venous pCO2 B Alveolar pO2 is less than pO2 of expired air C Alveolar pCO2 is twice that of the room air D Mixed venous pCO2 is more than alveolar pCO2 💡 Explanation Which of the following is TRUE about paial pressures of alveolar gases? ✓ Correct Answer: D. Mixed venous pCO2 is more than alveolar pCO2