In severe exercise, decrease in pH is due to: (A) Respiratory acidosis, (B) Lactic acidosis, (C) H+ retension, (D) HC03- excretion
Answer is B. In case of sever exercise, lactic acid deposits in muscles due to anaerobic respiration by white muscle fibers, This results in fatigue Ref:Guyton and Hall textbook of medical physiology 12th edition ,pag number:96