Question

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

• A. High pO2 and High pCO2
• B. High pO2 and Lesser H+ concentration
• C. Low pCO2 and High H+ concentration
• D. Low pCO2 and High temperature

Answer 1

Answer: (B)

High pO2 and Lesser H+ concentration

Answer 2

- The formation of oxyhaemoglobin occurs when oxygen binds to haemoglobin in the lungs, primarily in areas of high oxygen partial pressure (pO2).

- Lesser H+ concentration (i.e., less acidic) also favours the binding of oxygen to hemoglobin. This is because higher acidity (higher H+ concentration) reduces haemoglobin’s affinity for oxygen (Bohr effect).

Thus, high pO2 and lesser H+ concentration are conditions that favour the formation of oxyhaemoglobin.

Thus, the correct answer is (1).