Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): In the systemic tissues, the oxygen-haemoglobin dissociation curve shifts to the left. Reason (R): High pC O₂ , high H ^+ concentration, and higher temperature in the tissues decrease the affinity of haemoglobin for oxygen. In the light of the above statements, choose the most appropriate answer fr

Step-by-step solution

Assertion (A) is incorrect because in the systemic tissues, the conditions favour the dissociation of oxygen from oxyhaemoglobin, which corresponds to a shift of the oxygen-haemoglobin dissociation curve to the right, not the left. Reason (R) is correct. The systemic tissues are characterised by low pO₂ , high pCO₂ , high H ^+ concentration (low pH), and higher temperature. These factors decrease the affinity of haemoglobin for oxygen, facilitating its release (unloading) to the tissues. Therefore, the Assertion is