This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous system, Subject name: Physiology
[{'content': 'Decrease reflex response after repetitive stimulation \nSelect and explain. \nA. Summation, B. Fatigue, C. Irradiation, D. Occlusion', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Fatigue is produced in pa by bombardment of the brain by neural impulses from muscles and the decline in blood ph produced by lactic acidosis also makes one feel tired. Ref: Ganong&;s review of medical physiology;23rd edition; pg:637.', 'role': 'assistant'}]