Question

$O_2$ dissociation curve is plotted between p$O_2$ and

• A. % Hb saturation
• B. p${\mathrm{CO}}_2$
• C. Hb concentration
• D. RBC/${\mathrm{mm}}^3$ of blood

Answer 1

The correct option is A % Hb saturation

Oxygen is transported throughout the body in red blood cells, which contain an oxygen-binding protein called haemoglobin. Oxygen dissociation curves show the affinity of haemoglobin for oxygen. It is a graph with p$O_2$ on the X Axis and % Hb saturation on the Y Axis.