Question: Which one of the following statements concerning metabolic mechanisms of muscle fatigue is incorrect? Group of answer choices a. Depletion of the adipose tissue triglyceride is a significant cause of exhaustion during high-intensity short-term exercise. b. Phosphate accumulation and low myoplasmic pH are likely significant metabolic causes of fatigue during high-intensity short-term exercise. c. Glycogen depletion is the major contributing factor to the duration of low-intensity long-term exercise. d. Fast-twitch fiber types are best able to derive ATP from anaerobic glycogen use, while slow-twitch fibers are best able to derive ATP from aerobic fatty acid use.