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.
