Physiology At the altitude of 6500 meters, the atmospheric pressure is 347 Hg. What is the inspired PO2? A 73 mmHg B 63 mmHg C 53 mmHg D 83 mmHg 💡 Explanation At the altitude of 6500 meters, the atmospheric pressure is 347 Hg. What is the inspired PO2? ✓ Correct Answer: A. 73 mmHg