Read the following statements carefully: (I) Every 100 ml of oxygenated blood can deliver around 5 ml of O ₂ to the tissues under normal physiological conditions. (II) High pO ₂ and low pCO ₂ in alveoli are favourable for the formation of oxyhaemoglobin. (III) A rise in H ^+ concentration in the blood shifts the oxygen dissociation curve to the left. (IV) The binding of oxygen with haemoglobin is primarily related to

Step-by-step solution

Statement (I) is correct as per NCERT; under normal physiological conditions, every 100 ml of oxygenated blood delivers around 5 ml of O ₂ to the tissues. Statement (II) is correct because in the alveoli, high pO ₂ , low pCO ₂ , lesser H ^+ concentration and lower temperature are the factors that favour the formation of oxyhaemoglobin. Statement (III) is incorrect because a rise in H ^+ concentration (which means a decrease in pH) favours the dissociation of oxygen from oxyhaemoglobin, thereby shifting the oxygen d