That change happens because something gets triggered in the membrane, and what gets triggered is a voltage gated sodium channel, which is shown here.

变化的原因是膜上某些东西被触发了,被触发的是钠离子电压门控通道,展示在这儿了

耶鲁公开课 - 生物医学工程探索课程节选

Now, remember we talked about these last time, voltage-gated channels are channels that would allow the passage of sodium, in this case, but they can exist in two states, a closed state and an open state.

还记得我们上节课讨论过的吧,电压门控通道是,一种可以容许钠离子通过的通道,在这一例子中 电压门控通道有两种状态,关闭状态和开放状态

耶鲁公开课 - 生物医学工程探索课程节选