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

没有抗肌萎缩蛋白的支撑，肌膜塌缩变得不稳定。

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.

所以动作电位沿着肌肉细胞的膜，肌膜，它有许多深入细胞的管子，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.

数以千计被称为肌原纤维的微小平行线挤压在一起形成肌肉纤维，这就是你真正的肌肉细胞——具有线粒体、多个细胞核和称为肌膜的细胞膜的细胞。