They transmit signals down their axons by way of electrical impulses, or action potentials.

它们通过电子脉冲或动作电把信号向下传递给神经轴突。

And it begins with pacemaker cells generating their own action potentials.

它始于起搏细胞产生自己动作电。

These compounded factors can raise the speed of an action potential as high as 432 kilometers per hour.

这些复合因素可以将动作电提至每小时 432 公里。

So now we've paused on one motor action potential that's happening right now inside of your brain.

我们现在暂停在此时此刻正在你脑内一运动电势。

And the leakier the membrane gets, the faster it keeps triggering action potentials.

膜越泄漏，它触发动作电度就越快。

She actually said, " What of my actions potentially could have contributed to the situation that I find myself in? "

" 我哪些行为有可能导致我现在处境？”

Myelin is extremely important to neurons, because it helps to allow an action potential to propagate much faster.

髓鞘对于神经元十分重要，因为它可以极大地加动作电传播。

Since the leaking happens at a steady rate, the cells fire off action potentials like clockwork.

由于泄漏以稳定度发生，细胞像钟表一样发射动作电。

As you're listening to a chorus of action potentials.

当您正在聆听动作电合唱时。

That is an action potential that is happening inside the plant.

这是植物内部发生动作电。

OK. So here we see an action potential encoding information to move. Alright?

好。 所以在这里我们看到了动作电编码信息移动。 好吧？

What do we get? We get a beautiful action potential.

我们得到什么？ 我们获得了漂亮动作电。

Since chloride has a negative charge, it makes the inside of a cell more negative, and that inhibits an action potential.

由于氯离子带负电，这可导致细胞内负电荷积聚，来抑制动作电。

We've even seen an action potential in a human.

我们甚至已经在人类身上看到了动作电。

Since calcium has a positive charge, it makes the inside of the cell more positive, and that helps trigger an action potential.

由于钙离子带正电，这可导致细胞内正电荷积聚，来触发动作电。

So even if the brain sends a signal, the muscle cell can’t generate the action potential necessary to contract.

因此， 即使大脑发出信号，肌肉细胞也无法产生收缩所需动作电。

Membrane voltage becomes less negative, moving closer to the threshold potential, making it EASIER to initiate an action potential.

膜电压具有较小负值，接近阈值电，这样，更容易启动动作电。

Stimulus is required to generate an action potential.

需要刺激来产生动作电。

It has touch receptors that are sending that information back down in the form of an action potential.

它有触觉感受器，以动作电形式将信息传回。

Most symptoms of acute hypocalcemia can be attributed to the effect, it has on action potential generation in neurons.

急性低钙血症大多数症状可归因于其对神经元动作电产生影响。