A) sodium carbonate
B) carboxyhaemoglobin
C) bicarbonate
D) \[C{{O}_{2}}\]as such
Correct Answer: C
Solution :
In dissolved state 7% of CO 2 gets dissolved in the blood plasma and is carried in solution to lungs or about 0.3 mL of \[C{{O}_{2}}\] is transported per 100 mL of blood in dissolved state in blood plasma. In the form of bicarbonate about 70% of \[C{{O}_{2}}\](about 2.5 mL per 100 mL of blood received by blood from tissues, enters the RBCs where it reacts with water to form carbonic acid \[({{H}_{2}}C{{O}_{3}}).\] As carbaminohaemoglobin About 23% of \[C{{O}_{2}}\] is transported in combination with haemoglobin and plasma protein. \[C{{O}_{2}}\] reacts directly with amine radicals \[(N{{H}_{2}})\]of haemoglobin to form an unstable compound carbamino haemoglobin \[\text{Hb(C}{{\text{O}}_{\text{2}}}\text{)}\]Sodium bicarbonate acts as buffer of blood.
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