Question

Which of the following factors is not favourable for the formation of oxyhaemoglobin?

• A. High $p{O}_2$
• B. Low temperature
• C. Less H+ concentration
• D. High $pC{O}_2$

Answer 1

Answer: (D)

High $pC{O}_2$

Following are the four factors that are responsible for the oxyhaemoglobin in alveoli:

$p{O}_2$:The greater the partial pressure of the oxygen causes the binding of hemoglobin with the oxygen efficiently.

$Temperature$: The normal temperature favors the binding of hemoglobin with oxygen. The high temperature is responsible for the dissociation of the oxygen from haemoglobin.

$pC{O}_2$: The large amount of the carbon dioxide decreases the formation of the oxyhaemoglobin. The carbon dioxide has more affinity for haemoglobin than with the oxygen.

$H^{+}$: The increase in the hydrogen ion concentration or decrease in pH causes the increases in the dissociation of haemoglobin.

Thus, a high $pC{O}_2$ is not favourable for the formation of oxyhaemoglobin.

So, the correct answer is (D).