Question

Identify the wrong statement with reference to transport of oxygen.

a) Higher H+ conc. in alveoli favours the formation of oxyhaemoglobin

b) Low pCO2 in alveoli favours the formation of oxyhaemoglobin

c) Binding of oxygen with haemoglobin is mainly related to partial pressure of O2

d) Partial pressure of CO2 can interfere with O2 binding with haemoglobin.

Answer 1

a) Higher H+ conc. in alveoli favours the formation of oxyhaemoglobin

Explaination::
The Oxygen dissociation curve is highly useful in studying the effect of factors like pCO2 , H+ concentration, etc., on binding of O2 with haemoglobin. In the alveoli, where there is high pO2 , low pCO2 , lesser H+ concentration and lower temperature, the factors are all favourable for the formation of oxyhaemoglobin. In the tissues, where low pO2 , high pCO2 , high H+ concentration and higher temperature exist, the conditions are favourable for dissociation of oxygen from the oxyhaemoglobin