Oxygen hemoglobin dissociation curve shifts to right in all of the following conditions EXCEPT:
Ans. C Decreased H+Ref: Ganottg, 25th ed. pg. 640-641OXYGEN HEMOGLOBIN DISSOCIATION CURVE* Oxygen- hemoglobin dissociation curve is sigmoid 'S' shaped because binding of one oxygen molecule to heme increases the affinity of second heme molecule for oxygen and so on.Factors affecting affinity of Hb for oxygen and causing the shift of curve are:Left shiftRight Shift* This means the affinity of oxygen to Hb is increased and oxygen is bound more tightly to hemoglobin* This means the affinity of O2 to Hb is decreased which favours release of oxygen to tissue.* Factors leading to left shift are# Alkalosis or | pH# |pCO2 (CO2 ) content of blood)# |Temperature (Hypothermia)#| 2,3 DPG* Factors leading to right shift are:# Acidosis or | pH# | PCO2 (CO2 content of blood)# | Temperature (Hypothermia)# | 2,3 DPG
Hyperthermia
Decreased pH
Decreased H+
Increase CO2
Respiratory System