题目内容

肌节由

A. 1/2A带+I带+1/2A带
B. 1/2A带+I带
C. 1/2I带+A带+1/2I带
D. 1/2I带+A带
E. 1/2A带+1/2I带

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骨骼肌纤维的肌膜向胞质内凹陷形成

A. 肌浆网
B. 终池
C. 纵小管
D. 横小管
E. 肌节

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