that exist in the membrane around you

存在于你周围的细胞膜上
and they go from the closed state to the open state.

然后它们由封闭状态转为开放状态
In response to this small disturbance,

由于这一小小的电扩布
some new channels open,

一些新的通道打开了
these happen to be sodium channels.

这些恰好就是钠离子通道
They open, a lot of them open because there's a lot of them on your cell

通道打开大量的通道打开因为细胞上有大量这样的通道
because your cell is designed

因为你的细胞生来
to respond to voltages so it has a lot of these kinds of channels.

就需要对电压敏感因此细胞上有很多这类通道
Now,what happens when all these new sodium channels open?

当所有这些新的钠离子通道打开时都发生了什么
There's a rush of sodium from outside the cell to inside the cell.

钠离子急速从胞外流向胞内
Sodium's positively charged,

钠离子是带正电荷的
you get a rush of current going by you,

你就获得了一个瞬时电流