Approximately 70% of carbon dioxide absorbed | vedclass

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Question

(A) $CO_2$ is transported from the respiratory tissues to the lungs by the blood in $3$ ways:$(i)$ In dissolved state or as a physical solution: $A$ v

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as bicarbonate ions

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(A) $CO_2$ is transported from the respiratory tissues to the lungs by the blood in $3$ ways:$(i)$ In dissolved state or as a physical solution: $A$ very small amount is physically dissolved in plasma ($7\%$ i.e.,$0.3\, ml$ of $CO_2$ per $100\, ml$ of blood).$(ii)$ Bicarbonate ions: About $70\%$ (i.e.,$2.5\, ml$ per $100\, ml$ of blood) of $CO_2$ diffuses into plasma and then into $RBCs$,where it combines with $H_2O$ in the presence of the enzyme carbonic anhydrase to form carbonic acid,which then dissociates into hydrogen ions and bicarbonate ions.$(iii)$ Carbaminohaemoglobin: $23\%$ (i.e.,$1\, ml$ of $CO_2$ per $100\, ml$ of blood) combines with haemoglobin to form an unstable compound called carbaminohaemoglobin.

Approximately $70\%$ of carbon dioxide absorbed by the blood will be transported to the lungs:

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