What is the main reaction occurring in blood capillaries at the gas exchange surface in a human lung?
1 )
Carbonic acid dissociates into carbon dioxide and hydrogen ions.
2 )
Carbonic anhydrase converts carbon dioxide into hydrogencarbonate ions.
3 )
Carbon dioxide combines with haemoglobin to form carbaminohaemoglobin.
Carbon dioxide is produced from hydrogencarbonate ions by carbonic anhydrase.
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