Oxygen-Hemoglobin Dissociation Curve in Respiratory Physiology
This lecture explains the oxygen-hemoglobin dissociation curve, the sigmoidal relationship in respiratory physiology between the partial pressure of oxygen (PO2) and the percent saturation of hemoglobin. It covers how the curve's plateau and steep regions determine oxygen loading in the lungs versus oxygen unloading at tissues, and how rightward shifts (the Bohr effect, driven by increased CO2, protons, 2,3-BPG, and temperature) and leftward shifts (the Haldane-effect-related increased affinity) alter hemoglobin's affinity for oxygen and the amount of oxygen delivered to tissues under resting versus exercising conditions.
Oxygen-Hemoglobin Dissociation Curve in Respiratory Physiology
This lecture explains the oxygen-hemoglobin dissociation curve, the sigmoidal relationship in respiratory physiology between the partial pressure of oxygen (PO2) and the percent saturation of hemoglo…