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Question

O2 dissociation curve is plotted between pO2 and

A
% Hb saturation
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B
pCO2
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C
Hb concentration
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D
RBC/mm3 of blood
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Solution

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 pO2 on the X Axis and % Hb saturation on the Y Axis.

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