题目内容

有关心肌纤维横小管的结构,其中哪一项是错误的

A. 由肌膜凹陷形成
B. 与终池相贴近,组成二联体
C. 同一水平的横小管吻合成网
D. 位于A带和I带交界水平
E. 可传导肌膜兴奋

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心肌细胞彼此相连形成功能整体是靠

A. T小管
B. 肌浆网
C. 闰盘
D. 肌丝
E. 二联体

心肌细胞的形态特点为

A. 呈长梭形, 无横纹
B. 呈短柱状, 分支吻合成网
C. 有数十个至数百个细胞核
D. 无闰盘
E. 横纹比骨骼肌明显

心肌细胞的结构特点为

A. 有三联体
B. 横小管比骨骼肌细
C. 肌浆较稀疏
D. 有闰盘
E. 肌原纤维明显

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