And when we talk about any type of ion channel, there are just tons of different kinds of ion channels, and you can characterize them in a few different ways.

而当我们讨论任何一种离子通道时，离子通道有非常多种，你可以用几种不同的方法来描述它们。

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Because if it was a neurotransmitter activated ion channel, what would happen when the neurotransmitter bound here?

因为假如这是一个,神经递质激活的离子通道,当神经递质结合于此的时候,会发生些什么呢

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However, when that gate is opened, the sodium channel is now going to be incredibly selective and only let through sodium ions and no other type of ion.

但是，当闸门打开的时候，钠离子通道,将会有极高的选择性,不允许除钠离子以外的任何其它离子通过。

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The one that's on the top here is called ligand-gated ion channel and an ion channel is a protein that sits in the surface of a cell.

最上面的这个叫作配体门控离子通道,离子通道是一类位于细胞表面的蛋白

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In some cases it might be a ligand-gated ion channel.

有时受体可能是一个配体门控离子通道

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It can exist in - a gated ion channel - can exist in one or two states.

它们能够存在于,门控离子通道有一种或者两种状态

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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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It can also happen in other ways, it could be a G-protein coupled receptor which we talked about last time, which indirectly activates another ion channel to start the electrical signal.

还可以有其他方式,可以通过G蛋白偶联受体,这我们上次谈过,它可以间接激活,另一个离子通道以开启电信号

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