The graph presents oxygen dissociation curves for adult oxyhaemoglobin at two different carbon dioxide concentrations, 1 and 2. Which conditions could cause curve 1 to alter into the form of curve 2?
- Ahigh carbon dioxide concentration causing a decrease in pH
- Bhigh carbon dioxide concentration causing an increase in pH
- Clow carbon dioxide concentration causing a decrease in pH
- Dlow carbon dioxide concentration causing an increase in pH