Breathing and Exchange of Gases Question 19

19. Identify the wrong statement with reference to transport of oxygen.

[2020]

(a) Partial pressure of $CO_2$ can interfere with $O_2$ binding with haemoglobin

(b) Higher $H^{+}$conc. in alveoli favours the formation of oxyhaemoglobin

(c) Low $pCO_2$ in alveoli favours the formation of oxyhaemoglobin

(d) Binding of oxygen with haemoglobin is mainly related to partial pressure of $O_2$

Show Answer

Answer : b

Hints & Solution

(b) The correct option is (b) because higher $H+$ concentration favours the dissociation of oxygen from oxyhaemoglobin in tissues. In the alveoli, high pO2, low pCO2, lesser $H+$ concentration and lower temperature favour formation of oxyhaemoglobin.