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Respiratory Study Guide

Hemoglobin Affinity


Hemoglobin (Hb) affinity to O2 is measured on a dissociation curve.

Hb affinity chart


A shift to the right and Hb affinity decreases

A shift to the left and Hb affinity increases


CO2 is converted to bicarbonate ions

   CO2 + H2O H2CO3 H+ + HCO3-

carbon dioxide + water carbonic acid hydrogen ion + bicarbonate ion