Physiology A 32 year old high altitude mountaineer is observed to have a hematocrit of 70%. Which of the following represents the most likely cause/explanation A Polycythemia with increased red cell mass B Relative polycythemia due to dehydration C Polycythemia due to hemoconcentration D Polycythemia with high altitude pulmonary edema 💡 Explanation A 32 year old high altitude mountaineer is observed to have a hematocrit of 70%. Which of the following represents the most likely cause/explanation ✓ Correct Answer: A. Polycythemia with increased red cell mass