Left shift of oxyhaemoglobin curve is noticed under

Options

A. Normal temperature and pH
B. Low temperature and high pH
C. Low pH and high temperature
D. Low pH and low temperature

Answer

B

Explanation

Left shift of the curve is a sign of hemoglobin increase affinity for oxygen.
It is noticed under low temperature as with the increase in temperature metabolic activities increases and thus oxygen demand of tissues also increases and thus dissociation increases. At high pH fewer `H^(+)` ions are present thus dissociation of Oxyhemoglobin also decreases. Low `PCO_(2)` than `PO_(2)` favours the affinity of hemoglobin with oxygen.