a) dissolved CO2 has an insignificant role in the carriage of CO2 in the blood

b) HCO3 production is fast in plasma

c) ionic dissociation of carbonic acid in the red cell is fast without an enzyme

d) the CO2 concentration in blood is independent of the saturation of

haemoglobin with oxygen

e) the majority of CO2 is carried in the blood in the forms of dissolved CO2 and

carbamino-compounds