| 单词 | Muscle Fibers,Type II |
| 释义 | Muscle Fibers,Type II《英文msh词典》Muscle Fibers,Type II [同义词] Muscle Fibers,Type II [主题词] Muscle Fibers,Fast-Twitch [中文释义] 肌纤维,Ⅱ型 [英文释义] Skeletal muscle fibers having high myofibrillar ATPase activity,high glycolytic enzyme activities,and an intermediate glycogen content which produce a fast twitch. There are two types. Fast fatigable fibers,also called white fibers,have a low myoglobin content,and a small mitochondrial content,and fatigue rapidly due to their limited glycogen content and low capacity for oxidative metabolism. Fast fatigue-resistant fibers,also called red fibers,have a large mitochondrial content and a high myoglobin content,related to their resistance to fatigue. (From Best,Physiological Basis of Medical Practice,12th ed,p100) |
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