Now, this is in the resting state of all cells, there's some membrane potential and neurons have this resting membrane potential also.

现在这是一个静息状态的细胞,它具有膜电位,神经元也具有类似的静息电位

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Now, what happens during an action potential is that that membrane potential changes very rapidly and it changes from being negative to being more positive.

在动作电位产生时,膜电位迅速改变,从较负的电位向更正的电位改变

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That results in a dramatic change in the membrane voltage; the potential across the membrane and that's shown here by this rapid rise in membrane potential.

变化导致了膜电压的剧烈变化,膜电压就是跨膜的电势差,表现为膜电位的迅速上升

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For this particular cell here it looks like it's about -75 millivolts, so the inside of the cell is a little bit more negative than the outside.

这个细胞的膜电位是-75毫伏,所以细胞内侧跟外侧比起来电势要低一些

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When an action potential comes down this pre-synaptic axon, when it reaches this point here, it sets off the process of these vesicles dumping their content into the synaptic cleft.

当动作电位到达轴突的突触前膜时,当到达这一点时 小泡就将其内含物,排放到突触间隙中去

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It would generate an electrical signal because it would - you'd open the ion channel and you would ion fluxes and you would change the membrane potential in just the way I described for the action potential.

它会产生一个电信号,因为--,离子通道会打开,产生离子流,膜电位会改变,像我讲动作电位时那样

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