It is a small molecule called a neurotransmitter that works in our brain mostly.

它是一种小分子，被称为经递质，主要在我们的大脑中起作用。

That, along with it containing tyrosine, an amino acid that aids neurotransmitter production, may make it hard to get some rest if you have a bunch of protein before bed.

因为它含有酪氨酸，酪氨酸是一种帮助合成经传递物质的胺基酸。因此如果你在睡前食用蛋白质类食品，便可能造成睡眠困难。

The second aspect of romantic love is attraction, influenced by a neurotransmitter called dopamine.

情的第二个方面是吸引力，它受到一种叫做多巴胺的经递质的影响。

Serotonin is one of the oldest neurotransmitters.

“血清素是最古老的经递质之一。”

That learning, the researchers found, is made possible by the neurotransmitter dopamine.

研人员发现，这种学习通过经递质多巴胺来实现。

It's a neurotransmitter that helps promote feelings of attraction, excitement, and giddiness.

它是一种经递质，有助于促进吸引、兴奋和头晕的感觉。

Caffeine is a pro at mimicking a neurotransmitter called adenosine.

咖啡因是一种能够像“”经递质一样在经细胞间传递信息。

When this pathway activates, the neurotransmitter starts a chain reaction.

当这一途径激活时，经递质开始连锁反应。

While dopamine and endorphin delight us, the other neurotransmitters send information from A to B.

当多巴胺和内啡肽让我们兴奋时，其他经递质将信息从 A 传递到 B。

Our motivation levels are affected by dopamine, a hormone and neurotransmitter.

我们的动力水平受到多巴胺的影响，多巴胺是一种激素和经递质。

On the flip side, the main inhibitory neurotransmitter in the brain is GABA.

另一方面，脑部主要的抑制性经递质为GABA。

Tyrosine is then turned into neurotransmitters important for normal brain development and function.

酪氨酸接着会被转化成对大脑正常的发育和功能都很重要的经递质。

Together, these changes in neurotransmitters and hormones combined with activated neural pathways, help us cognitively restructure potentially harmful thoughts to better manage our circumstances.

总体上，这些经递质和荷尔蒙的变化与被激活的经通路相结合，帮助我们在认知上调整潜在的有害思想，从而更好地应对我们所处的境况。

And that could alter the activity of neurotransmitters and create a pleasurable sensation.

这可以改变经递质的活动，创造一种愉悦的感觉。

If you're very hungry neurotransmitters can't be produced which results in communication between the brain's 86 billion neurons breaking down, compromising your ability to think and make good decisions.

如果你非常饥饿，经递质就无法产生，这会导致大脑 860 亿经元之间的交流中断，影响你思考和做出正确决定的能力。

And during the formation of memories, those pathways get modified, making it easier for neurotransmitters to travel among specific groups of neurons.

在记忆形成的过程中，这些通路被修改，使经递质更容易在特定的经元群中穿行。

Here's one that's sort of reading the DNA and making RNA. And then this one is carrying a huge sac of neurotransmitters from one end of the brain cell to the other.

这里有一种读取DNA和制造RNA的方法。然后这一只携带着一个巨大的经递质囊从脑细胞的一端传到另一端。

In the central nervous system, nicotinic receptors are on pre-synaptic axon terminals of neurons, and when nicotine binds to them, it triggers the release of neurotransmitters like dopamine, acetylcholine, and glutamate, which is why it's considered an acetylcholine agonist.

在中枢经系统中，烟碱受体分布于突触前经元的轴突末端，当尼古丁与受体结合后，会触发多巴胺、乙酰胆碱、谷氨酸盐等经递质的释放，因此尼古丁被认为是一种乙酰胆碱受体兴奋剂。

Within about 10 seconds, the bloodstream carries a stimulant called nicotine to the brain, triggering the release of dopamine and other neurotransmitters including endorphins that create the pleasurable sensations which make smoking highly addictive.

在大概十秒的范围内，血液携带一种叫做尼古丁的兴奋剂进入大脑，多巴胺和其他经递质释放的触发，包括内啡肽，会通过制造愉快的感觉，使吸烟上瘾。

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.

兴奋性经递质通过使突触后经元内部更加积极并使其更接近其动作电位阈值来去极化突触后经元，使其更有可能将该信息发送到下一个经元。