NEETZoologyBreathing and Exchange of Gases
What are the conditions favourable for dissociation of oxygen from oxyhaemoglobin in the tissues?
Options
- AHigh pO₂, low pCO₂, low H⁺ concentration and lower temperature
- BLow pO₂, high pCO₂, high H⁺ concentration and higher temperature
- CHigh pO₂, low pCO₂, high H⁺ concentration and higher temperature
- DLow pO₂, high pCO₂, low H⁺ concentration and lower temperature
Correct answer
B. Low pO₂, high pCO₂, high H⁺ concentration and higher temperature
Step-by-step solution
Haemoglobin is a red coloured iron containing pigment present in the RBCs. O2 can bind with haemoglobin in a reversible manner to form oxyhaemoglobin. 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+ concentration, etc., on binding of O2 with haemoglobin. In the alveoli, where there is high pO2, low pCO2, lesser H+ concentration and lower te