The toxic effect of carbon monoxide is due to its greater affinity for haemoglobin as compared to oxygen by (approx.) (in $\times$)

  • A
    $200$
  • B
    $2$
  • C
    $1000$
  • D
    $20$

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The chloride shift is observed for the movement of which of the following ions?

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

Which of the following is true regarding the transport of $CO_2$ by red blood cells $(RBCs)$ in humans?

Name the enzymes $A$ and $B$ in the following equation:
$CO _2+ H _2 O \underset{B}{\stackrel{A}{\rightleftharpoons}} H _2 CO _3 \underset{B}{\stackrel{A}{\rightleftharpoons}} HCO _3^{-}+ H ^{+}$

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

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