Approximately 70% of carbon dioxide absorbed | vedclass

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Question

(A) Approximately $70\%$ of $CO_2$ (about $2.5 \ ml$ per $100 \ ml$ of blood) received by the blood from the tissues enters the $RBCs$,where it reacts

Vedclass · Accepted Answer

as bicarbonate ions

Vedclass · Answer

(A) Approximately $70\%$ of $CO_2$ (about $2.5 \ ml$ per $100 \ ml$ of blood) received by the blood from the tissues enters the $RBCs$,where it reacts with water to form carbonic acid $(H_2CO_3)$.Carbonic anhydrase,an enzyme found exclusively in $RBCs$,speeds up the formation of $H_2CO_3$ and rapidly converts it back to carbon dioxide and water when the blood reaches the lungs.Almost as rapidly as it is formed,the carbonic acid in $RBCs$ dissociates into hydrogen ions $(H^+)$ and bicarbonate ions $(HCO_3^-)$.These bicarbonate ions are then transported in the plasma to the lungs.

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

Similar Questions

Although much $CO_2$ is carried in the blood,yet blood does not become acidic. This is because

$A = CO_2$ is carried in the plasma mainly as $HCO_3^-$ ions.
$R =$ Carbonic anhydrase catalyzes the formation of $HCO_3^-$ ions.

Select the $INCORRECT$ statement regarding the transport of respiratory gases.

Which factors favour the binding of $CO_2$ with $Hb$ in tissues?

What happens during the toxic effect of carbon monoxide $(CO)$?

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