Identify the correct sentence.

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Question

(A) $1$. In tissues,$PCO_2$ is high and $PO_2$ is low,which promotes the dissociation of $O_2$ from oxyhemoglobin and facilitates the binding of $CO_2

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When $PCO_2$ is high and $PO_2$ is low as in the tissues,more binding of carbon dioxide occurs.

Vedclass · Answer

(A) $1$. In tissues,$PCO_2$ is high and $PO_2$ is low,which promotes the dissociation of $O_2$ from oxyhemoglobin and facilitates the binding of $CO_2$ to hemoglobin (Haldane effect).$2$. Fibrosis is a respiratory disorder caused by chronic exposure to dust,not a digestive disorder.$3$. The solubility of $CO_2$ is $20-25$ times higher than that of $O_2$,not lower.$4$. Carbonic anhydrase is present in very high concentrations in $RBC$s,not in plasma.Therefore,the correct statement is option $A$.

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