The graph compares the percentage saturation of haemoglobin with oxygen at different partial pressures of oxygen and at two different concentrations of carbon dioxide. How does increasing the concentration of carbon dioxide affect this?
- AIt increases the affinity of haemoglobin for oxygen at respiring tissues.
- BIt increases the dissociation of haemoglobinic acid inside red blood cells.
- CIt increases the dissociation of oxygen from haemoglobin at respiring tissues.
- DIt increases the inhibition of carbonic anhydrase enzyme in red blood cells.