一种爬行动物肌神经接头的超微结构。
The ultrastructure of a reptilian myoneural junction.
作者信息
ROBERTSON J D
出版信息
J Biophys Biochem Cytol. 1956 Jul 25;2(4):381-94. doi: 10.1083/jcb.2.4.381.
Abstract
Myoneural junctions in Anolis are characterized by the formation of troughs in the surface of the muscle fibers in which small branches of the terminal axon lie. The muscle surface membrane lining the troughs is thrown into complex branching and anastomosing folds, which compose the subneural apparatus of Couteaux. A compound membrane 500 to 700 A thick separates axoplasm from sarcoplasm at the endings. This consists of five distinct layers and is described in detail. A thin layer of cytoplasm (probably Schwann) separates terminal axoplasm from extracellular space at the surfaces of the junctional troughs. Terminal axoplasm lacks axoplasmic filaments and contains numerous vesicular or tubular appearing structures about 300 to 500 A in diameter. Both terminal axoplasm and sarcoplasm contain numerous mitochondria.
摘要
安乐蜥的肌神经接头的特征是在肌纤维表面形成槽，终末轴突的小分支位于这些槽中。衬于槽内的肌表面膜形成复杂的分支和吻合褶，构成库托的神经下装置。在终末处，一层厚500至700埃的复合膜将轴浆与肌浆分隔开。这层膜由五个不同的层组成，并进行了详细描述。一层薄的细胞质（可能是施万细胞的）在连接槽表面将终末轴浆与细胞外空间分隔开。终末轴浆缺乏轴浆细丝，含有许多直径约300至500埃的囊泡状或管状结构。终末轴浆和肌浆中都含有大量线粒体。
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