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General Medicine General 8cf9d2f7

The oxygen hemoglobin dissociation curve is sigmoid because:

A
Binding of one oxygen molecule increases the affinity of binding other 0, molecules
B
Binding of one oxygen molecule decrease the affinity of binding other 02 molecules
C
Oxygen affinity of Hemoglobin decreases when the pH of blood falls
D
Binding of oxygen to hemoglobin reduces the affinity of Hb for CO2

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