<prompt> O2-Hb dissociation curve is shifted to left by -AcidosisHyperthermiaIncreased P50Fetal hemoglobin  <response>: Ans. is d i.e., Fetal hemoglobin Fetal hemoglobin has considerably less affinity for 2, 3-DPG than does adult hemoglobin. In human blood, the affinity offetal hemoglobin for 2, 3-DPG is only about 40 that of adult hemoglobin. This makes fetal hemoglobin behave as if 2, 3-DPG levels are low; therefore, the oxygen dissociation curve is shifted to the left - Clinical physiology in childhoodOxveen dissociation curveShifted to rightShifted to lefto Decreased oxygen affinity to hemoglobino Increased P50o Increased oxygen delivery to tissueso Causes : Decreased pH Acidosis Increased temperature Increased PCO2 Increased 2, 3 DPG BPGi Growth hormone, Androgen, thyroid hormoneii Exerciseiii Tissue hypoxiaiv High altitudev Anemiavi Alkalosisvii Cyanotic CHDviii Pregnancyix Chemicals : Inosine, Pyruvate, PEP, phosphate Sickle hemoglobin HbSo Increased oxygen affinity to hemoglobino Decreased P50o Decrease oxygen delivery to tissueso Causes : Increased pH alkalosis Decreased temperature Decreased PCO2 Decreased 2,3 DPG BPG:-Stored blood Fetal hemoglobin HbF 