Notes from NEET topper
Oxygen Dissociation Curve:
The oxygen dissociation curve is a graphical representation of the relationship between the partial pressure of oxygen (PaO2) in the blood and the saturation of hemoglobin with oxygen (SaO2).
The curve is sigmoidal in shape, which means that hemoglobin’s affinity for oxygen changes at different oxygen concentrations. At low oxygen levels (e.g., in tissues), hemoglobin has lower saturation. At high oxygen levels (e.g., in the lungs), hemoglobin becomes highly saturated.
This sigmoidal curve allows hemoglobin to efficiently load oxygen in the lungs (where oxygen is abundant) and release oxygen in the tissues (where oxygen is needed).
