Assertion: A rise in PCO2, H+ ions and temperature shifts the HbO2 dissociation curve to right. Reason: A rise in PCO2 or fall in pH decreases oxygen affinity for haemoglobin.

Question

Assertion: A rise in PCO2, H+ ions and temperature shifts the HbO2 dissociation curve to right. Reason: A rise in PCO2 or fall in pH decreases oxygen affinity for haemoglobin. (A) If both assertion and reason are true and reason is the correct explanation of assertion (B) If both assertion and reason are true but reason is not the correct explanation of assertion (C) If assertion is true but reason is false (D) If both assertion and reason are false

Tardigrade Admin · Accepted Answer

A shift to the right of oxygen dissociation curve indicates dissociation of oxygen from haemoglobin. In the tissues, low pO2, high pCO2, high H+ concentration (low pH or acidity) and higher temperature favour dissociation of oxygen from the oxyhaemoglobin.

Q. Assertion : A rise in $PC O_{2}$ , $H^{+}$ ions and temperature shifts the $H b O_{2}$ dissociation curve to right.
Reason : A rise in $PC O_{2}$ or fall in pH decreases oxygen affinity for haemoglobin.

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

A shift to the right of oxygen dissociation curve indicates dissociation of oxygen from haemoglobin. In the tissues, low $p O_{2}$ , high $pC O_{2}$ , high $H^{+}$ concentration (low $p H$ or acidity) and higher temperature favour dissociation of oxygen from the oxyhaemoglobin.

Q. Assertion : A rise in PCO2​, H+ ions and temperature shifts the HbO2​ dissociation curve to right. Reason : A rise in PCO2​ or fall in pH decreases oxygen affinity for haemoglobin.