What percentage of CO2 flows in blood in form of bicarbonates?
A
7%
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B
23%
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C
50%
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D
70%
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Solution
The correct option is D 70% Carbon dioxide is transported in the blood in three ways: 10% is dissolved in plasma, 20% is carried on haemoglobin bound to globins, and 70% exists as bicarbonate, an important buffer of blood pH.