When active tissues have high carbon dioxide concentrations, oxyhaemoglobin needs to release oxygen to the tissues.
How is the carbon dioxide transported away by the blood from the tissues?
1. as carboxyhaemoglobin
2. as carbaminohaemoglobin
3. as hydrogencarbonate ions
1 )
1, 2 and 3
2 )
1 and 3 only
2 and 3 only
4 )
2 only
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