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The dessociation curve is associated with a)oxygen b)oxyhaemoglobin

The oxygen dissociation curve is a graph that shows the percent saturation of hemoglobin at various partial pressures of oxygen.  Commonly a curve may be expressed with the P50 value.  This is a value which tells the pressure at which the erythrocytes are fifty percent saturated with oxygen.  (Bouverot, 1985).  The purpose of an oxygen dissociation curve is to show the equilibrium of oxyhemoglobin and nonbonded hemoglobin at various partial pressures (Oxygen Dissociation Curve).  At high partial pressures of oxygen, usually in the lungs, hemoglobin binds to oxygen to form oxyhemoglobin.  When the blood is fully saturated all the erythrocytes are in the form of oxyhemoglobin
The oxyhemoglobin dissociation curve mathematically equates the percentage saturation of hemoglobin to the partial pressure of oxygen in the blood


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