Q.The oxygen - haemoglobin dissociation curve will show a right shift in case of

A right shift of the oxygen-haemoglobin dissociation curve means haemoglobin's affinity for oxygen has fallen, favouring the release (dissociation) of oxygen rather than its binding — this is exactly what happens under tissue-like conditions. Among the given options, a high carbon-dioxide pressure is one of the tissue conditions that favours dissociation of oxygen from haemoglobin, producing this rightward shift, whereas high oxygen pressure, low carbon-dioxide pressure, and low …

The oxygen dissociation curve plots the percentage saturation of haemoglobin with oxygen against the partial pressure of oxygen, and this curve shifts depending on the surrounding conditions of carbon-dioxide pressure, hydrogen-ion concentration and temperature. …

Method: Determining Which Conditions Shift the Oxygen Dissociation Curve Right vs Left

Use this approach for any question asking which condition shifts the O2-haemoglobin dissociation curve in a given direction.

Steps

Step 1: Recall what each shift direction physically means

A rightward shift means reduced haemoglobin affinity for O2 at a given pO2, i.e. easier release of oxygen. A leftward shift means the opposite — easier binding.

Step 2: Recall which conditions favour each direction

High pCO2, high H+ (low pH), and higher temperature all favour release (right shift, tissue-type conditions). Low pCO2, low H+ (high pH), and lower temperature favour binding (left shift, alveolar-type conditions). …