NEETZoologyBreathing and Exchange of Gases
How does pO₂ affect the binding of CO₂ with haemoglobin?
Options
- AIncreases the binding
- BDecreases the binding
- CHas no effect on binding
- DCannot be determined
Correct answer
C. Has no effect on binding
Step-by-step solution
.CO₂ is carried by haemoglobin as carbamino-haemoglobin (about 20-25 per cent). CO2 is carried by haemoglobin as carbamino-haemoglobin (about 20-25 per cent). This binding is related to the partial pressure of CO2. pO2 is a major factor which could affect this binding . When pCO2 is high and pO2 is low as in the tissues, more binding of carbon dioxide occurs whereas, when the pCO2 is low and pO2 is high as in the alveoli, dissociation of CO2 from carbamino-haemoglobin takes place, i.e., CO2 which is bound to haemog