Without the support of dystrophin in place, the sarcolemma essentially wilts and becomes unstable.

没有抗萎缩蛋白的，膜塌缩变得不稳定。

So that action potential zips along a muscle cell's membrane, the sarcolemma, which has lots of tubes that run deep inside the cell, called T-Tubules.

所动作电位沿着肉细的膜，膜，它有许多深入细的管子，叫做 T 管。

Thousands of tiny, parallel threads called myofibrils squish together to form muscle fibers, which are your actual muscle cells — cells with mitochondria, multiple nuclei, and a cellular membrane called a sarcolemma.

数被称为原纤维的微小平行线挤压在一起形成肉纤维，这就是你真正的肉细——具有线粒体、多个细核和称为膜的细膜的细。