Decrease reflex response after repetitive stimulation: (A) Summation, (B) Fatigue, (C) Irradiation, (D) Occlusion
Answer is B. 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.