And meanwhile, those calcium pumps are working hard to restock the calcium in the sarcoplasmic reticulum.

与此同时，这些钙泵正在努力补充肌浆网中的钙。

Because, remember, the relaxation period of a twitch is when all the calcium is being pumped back into the sarcoplasmic reticulum.

因为，记住，抽搐的放松期是所有的钙都被泵入肌浆网的时候。

When the action potential travels down one of those tubes, it eventually triggers the voltage-sensitive proteins that are linked to those calcium channels on the cell's sarcoplasmic reticulum.

当动作电位通过其中一个管子时，它最终会触发与细胞肌浆网上的钙通道相连的电压敏感蛋白。

But soon the fiber slides back down into the relaxation period, when the calcium gets pumped back into the sarcoplasmic reticulum, and the actin and myosin stop the binding cycle, and the muscle relaxes.

但很快，纤维滑回松弛期，此时钙被泵入肌浆网，肌动蛋白和肌球蛋白停止结合循环，肌肉放松。

And muscle cells also have their own version of an endoplasmic reticulum — the cell's transport and storage system — but in this case it's specialized, so it gets a special name: the sarcoplasmic reticulum.

肌肉细胞也有自己的内质网——细胞的运输和储存系统——但在这种情况下，它是专门化的，所以它有一个特殊的名字：肌质网。