NEETZoologyBreathing and Exchange of Gases
What is the significance of the Oxygen dissociation curve?
Options
- ATo study the effect of pO₂ on binding of O₂ with haemoglobin
- BTo study the effect of pCO₂ on binding of O₂ with haemoglobin
- CTo study the effect of H⁺ concentration on binding of O₂ with haemoglobin
- DAll of the above
Correct answer
D. All of the above
Step-by-step solution
Each haemoglobin molecule can carry a maximum of four molecules of O2. Binding of oxygen with haemoglobin is primarily related to partial pressure of O2. Partial pressure of CO2, hydrogen ion concentration and temperature are the other factors which can interfere with this binding. A sigmoid curve is obtained when percentage saturation of haemoglobin with O2 is plotted against the pO2. This curve is called the Oxygen dissociation curve and is highly useful in studying the effect of factors like pCO2, H+ concentrati