(A) Carbon dioxide $(CO_2)$ reacts with water $(H_2O)$ in the blood to form carbonic acid $(H_2CO_3)$,which then dissociates into hydrogen ions $(H^+)

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$H_2O$ to form $H^+$ and $HCO_3^-$,carbonic anhydrase

(A) Carbon dioxide $(CO_2)$ reacts with water $(H_2O)$ in the blood to form carbonic acid $(H_2CO_3)$,which then dissociates into hydrogen ions $(H^+)$ and bicarbonate ions $(HCO_3^-)$.This reaction is significantly accelerated by the enzyme carbonic anhydrase,which is present in high concentrations within red blood cells.The increase in $H^+$ concentration leads to a decrease in the $pH$ of the blood.

Class 11 Biology Breathing and Exchange of Gases Transport of gases

Difficult

The presence of $CO_2$ in blood will lower $pH$ because $CO_2$ combines with . . . . . . ,with the rate of reaction increased by . . . . . . .

AIIMS 2013 All AIIMS

A
$H_2O$ to form $H^+$ and $HCO_3^-$,carbonic anhydrase
B
$H_2O$ to form only $HCO_3^-$,carbonic anhydrase
C
$H_2O$ to form only $H^+$,carbonic ions
D
$H^+$ to form $HCO_3^-$,oxyhaemoglobin

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Breathing and Exchange of Gases

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Transport of gases

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AIIMS 2013 Paper All AIIMS years →

Identify the correct group of statements:
$I.$ Oxygen is carried by haemoglobin
$II.$ Oxygen is carried by carbonic anhydrase
$III.$ $CO_{2}$ is carried by haemoglobin
$IV.$ $SO_{2}$ is carried by haemoglobin
$V.$ Only oxygen is transported by the blood
$VI.$ Only $CO_{2}$ is transported by the blood
Choose the correct option.

Medium

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............$\%$ of $O_2$ is transported through the plasma in a dissolved state,nearly ...........$\%$ of $CO_2$ is transported by $RBCs,$ and ...................$\%$ of $CO_2$ is carried as bicarbonate.

Medium

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Oxyhaemoglobin in the blood is formed when

Medium

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When the affinity of $O_2$ and $CO_2$ for haemoglobin is compared,it is:

Medium

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The movement of chloride ions into erythrocytes from the plasma to maintain osmotic balance during transport of gases is known as

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The presence of $CO_2$ in blood will lower $pH$ because $CO_2$ combines with . . . . . . ,with the rate of reaction increased by . . . . . . .

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............$\%$ of $O_2$ is transported through the plasma in a dissolved state,nearly ...........$\%$ of $CO_2$ is transported by $RBCs,$ and ...................$\%$ of $CO_2$ is carried as bicarbonate.

Oxyhaemoglobin in the blood is formed when

When the affinity of $O_2$ and $CO_2$ for haemoglobin is compared,it is:

The movement of chloride ions into erythrocytes from the plasma to maintain osmotic balance during transport of gases is known as

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