This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gas Transport, Subject name: Physiology
[{'content': 'All of the following factors influence hemoglobin dissociation curve, except: \nSelect and explain. \nA. Chloride ion concentration, B. CO2 tension, C. Temperature, D. 2-3 DPG levels', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e. Chloride ion concentration Three conditions affect the oxygen-hemoglobin dissociation curve, the pH, the temperature, and the concentration of 2, 3-biophosphoglycerate.CO2 tension (PCO2) affects the pH of blood and hence the 02-Hb dissociation curve.Shift of Q2-Hb dissociation curveFactorsShift to RightShift to leftpH||temperature||2, 3 DPG cone.||PCO2||", 'role': 'assistant'}]