The diagram illustrates how three different carbon dioxide concentrations affect the oxygen dissociation curve for human haemoglobin. $X$ = partial pressure of carbon dioxide: $3.0\,\text{kPa}$ $Y$ = partial pressure of carbon dioxide: $5.0\,\text{kPa}$ $Z$ = partial pressure of carbon dioxide: $7.0\,\text{kPa}$ What effect does a rise in carbon dioxide concentration have on haemoglobin?
- AIt makes it less efficient at taking up oxygen and less efficient at releasing it.
- BIt makes it less efficient at taking up oxygen and more efficient at releasing it.
- CIt makes it more efficient at taking up oxygen and less efficient at releasing it.
- DIt makes it more efficient at taking up oxygen and more efficient at releasing it.