Excitatory neurotransmitters depolarize the postsynaptic neuron by making the inside of it more positive and bringing it closer to its action potential threshold, making it more likely to fire that message on to the next neuron.

兴奋性神经递质通过使突触后神经元内更加积极并使其更接近其动作电位阈值来去极化突触后神经元，使其更有将该信息发送到下一个神经元。

Remember that at rest, cells are negatively charged relative to the slightly positive outside environment and when they depolarize, the cells become positively charged, leaving a slightly negative charge in the outside environment.

要记住在静息状态下，细胞带负电，其环境则相对稍带正电；当它们去极化时，细胞带有正电，它的环境带有负电。

But eventually, the resting membrane potential gets so high that it's above the threshold potential, meaning that once the muscle depolarizes and contracts, it can't repolarize to allow another contraction.

但最终，静息电位变得太高，以至于超过阈值点位，这意味着一旦肉去极化收缩，就不复极化以进行下一次收缩了。

And, to the degree that the heart's in-between, the heart will be depolarized and normal rhythm will, will be restored.

当心脏处于这两者之间时，心脏会去极化，恢复正常的心律。

And this is how you could tell if the PVC depolarized the atrium or not.

你由此区分室性期前收缩是否除极了心房。

Most cells in your body only depolarize after being triggered by an external stimulus, or by a neighboring cell, in a long chain reaction of action potentials that's set off by the nervous system.

你体内的大多数细胞只有在被激或邻近细胞触发后才会去极化，这是由神经系统引发的动作电位的长链反应。

With low levels of extracellular calcium, voltage-gated sodium channels are less stable and more likely to open up, which allows the cell to depolarize more easily, and makes the neuron more excitable.

当细胞钙的水平较低时，电压门控钠离子通道不稳定，更容易开放，这使细胞更容易去极化，并使神经元更易兴奋。

Now, if we measure out the interval between each SA node fire, we see that it should have fired here, but it doesn't because it was depolarized by the ectopic focus.

这时，如果我们测量每一个窦房结冲动的间隔，我们以看到它本应在此处发放，但并没有，因为它被异位起搏点除极化了。

That process started by depolarizing the cell — that is, pushing the cell's membrane potential from negative toward positive, past a threshold that triggered voltage-gated ion channels to open.

这个过程是从细胞去极化开始的——也就是说，将细胞膜电位从负极推高到正极，超过了触发电压门控离子通道打开的阈值。

Another type of atrial ectopic focus is a reentrant loop, which is when there's some tissue that doesn't depolarize right.

另一类房性异位起搏点是一个折返环路，主要发生在当某些组织不正确地除极的时候。

In this case, after being depolarized, the sinus node waits its 1 second, and then sends another signal and again we carry on as normal.

在这种情况下，窦房结在除极之后等待了1秒，然后发放另一个信号，心搏得以重新正常进行。

One important effect of the premature depolarization is that the ectopic focus will depolarize the cells of the SA node, causing the SA node to skip a cycle.

过早除极的一个重要影响就是异位起搏点将会使窦房结细胞除极，导致窦房结跳过一个心动周期。

In this case the wave of depolarization makes it into the atrium and depolarizes the atrium, including the sinus node, so essentially the sinus node resets about 4.4 boxes from the last, or 0.88 seconds.

在这种情况下，除极波进入心房并使其除极，包括窦房结，因此窦房结被重置，离上次大约4.4小格，或0.88秒。

And it will actually depolarize some of these national fights that we've seen.

这实际上将有助于化解我们目睹的一些全国性争端。

For those whose compasses were not depolarized there seemed many odd things in these houses.

对于那些罗盘没有去极化的人来说，这些房子里似乎有很多奇怪的东西。

But then the metabolism of that glucose that produces the ATP and further depolarizes the cell, we believe that it will cause the release of the hormone, of the neuropeptide.

然而， 葡萄糖的代谢产生ATP并进一步使细胞去极化，我们认为这会导致激素，即神经肽的释放。

And then when they depolarize it by opening up these ion channels then we can send a message down the neuron.

然后当它们通过打开这些离子通道去极化时，我们就以将信息沿着神经元传递下去。

Ectopic beats can also have " triggered activity" which is where cells depolarize early.

异位心搏也有“激发活动”，即在细胞提前除极的位置。

The cells of the SA node can depolarize on their own without any external influence.

SA结细胞以自行去极化而不受界影响。

In bundle branch blocks, the UN-affected ventricle depolarizes first.

在束支传导阻滞中，未受影响的心室首先去极化。