Q.

Select the favourable conditions required for the formation of oxyhaemoglobin at the alveoli.            [2021]

1 Low pO2, low pCO2, more H+, higher temperature  
2 High pO2, low pCO2, less H+, lower temperature  
3 Low pO2, high pCO2, more H+, higher temperature  
4 High pO2, high pCO2, less H+, higher temperature  

Ans.

(2)

In the alveoli, high pO2, low pCO2, less H+ concentration and low temperature are the favourable conditions required for formation of oxyhaemoglobin. This means oxygen gets bound to haemoglobin in the lung surface.