APII Study Guide Home Page

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