Physiology PCO2 increase leads to: A Shift of Oxy-Hb dissociation curve to left B Shift of Oxy-Hb dissociation curve to right C Shift of Oxy-Hb dissociation curve upwards D Shift of Oxy-Hb dissociation curve downwards 💡 Explanation PCO2 increase leads to: ✓ Correct Answer: B. Shift of Oxy-Hb dissociation curve to right