2024 Breathing and Exchange of GasesFactors Favouring Oxyhaemoglobin Formation Medium Question 6 of 53 in Breathing and Exchange of Gases

Which of the following factors are favourable for the formation of oxyhaemoglobin in alveoli?

A Low $pCO_2$ and High $H^+$ concentration
B Low $pCO_2$ and High temperature
C High $pO_2$ and High $pCO_2$
D High $pO_2$ and Lesser $H^+$ concentration

The answer is D.

Solution

In the alveoli, high $pO_2$, low $pCO_2$, lesser $H^+$ concentration and lower temperature are all favourable for the formation of oxyhaemoglobin. In the tissues, low $pO_2$, high $pCO_2$, high $H^+$ concentration and higher temperature favour dissociation of oxygen from oxyhaemoglobin. So high $pO_2$ and lesser $H^+$ concentration favour oxyhaemoglobin formation.

Concept Conditions in alveoli favouring O2 binding to haemoglobin

Breathing and Exchange of Gases in past papers

53 questions from this chapter have appeared across 20 exam years.