Zoology - Breathing and Exchange of Gases Question with Solution | TestHub

Oxygen binds with haemoglobin in a reversible manner to form Oxyhaemoglobin. A maximum of four oxygen molecules are carried by each Hb. The binding of oxygen is related to partial pressure of${\mathrm{O}}_2$where as partial pressure of$\mathrm{C}{\mathrm{O}}_2$, hydrogen ion concentrationand temperature are factors interfering with its binding. The factors which are favourable for formation of oxyhaemoglobin in the alveoli are high${\mathrm{p}\mathrm{O}}_2$, lesser${\mathrm{H}}^{+}$concentration, low${\mathrm{p}\mathrm{C}\mathrm{O}}_2$and lower temperature. The low${\mathrm{p}\mathrm{O}}_2$, high${\mathrm{p}\mathrm{C}\mathrm{O}}_2$, high${\mathrm{H}}^{+}$concentration and higher temperature in the tissues are all the conditions leading to dissociation of oxygen from the oxyhaemoglobin. This indicates that oxygen is bounded to haemoglobin in the lung and dissociated in the tissues.