Physiology The following acute respiratory response to ascent to high altitude, there is normalization of blood pH. The mechanism is A Increased erythropoesis leads to increased buffering by hemoglobin B Increased excretion of HCO3 - by the kidneys C Increased levels of 2, 3--DPG D Retention of bicarbonate by the kidneys 💡 Explanation The following acute respiratory response to ascent to high altitude, there is normalization of blood pH. The mechanism is ✓ Correct Answer: D. Retention of bicarbonate by the kidneys