This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
Oxidative capacity is high in which type of skeletal muscle fiber 
Select and explain. 
A. Type I fiber, B. Type IIA fiber, C. Type IIB fiber, D. All of the above
A: Type I fiber
Answer: A: Type I fiber 
Explanation: Oxidative capacity is high in type I fiber (slow-oxidative), moderate in type IIA (fast-oxidative-glycolytic), low in Type IIB fiber (fast-glycolytic).Reference: Ganong's review of Medical Physiology,25th ed, p 108