There are two important chemicals found in all our brains - dopamine and acetylcholine.

多巴胺和乙酰胆碱。

In both systems, neurons release acetylcholine, or ACh, in their preganglionic synapses.

在这两个系统中，神经元在节前突触中释放乙酰胆碱。

Like all preganglionic fibers, these release acetylcholine, too.

像所有节前纤维一样，它们也释放乙酰胆碱。

It works by blocking the release of a neurotransmitter called acetylcholine, which controls muscle contractions.

乙酰胆碱的释放。乙酰胆碱正是神经控制肌肉收缩的那道指令。

That's why we prefer the more slow-burn feeling we get when our brains release acetylcholine.

这也是为什么我们比较喜欢脑中释放乙酰胆碱时平稳和缓的感受。

The acetylcholine bind to muscarinic receptors on endothelial cells, which activates the enzyme nitric oxide synthase.

乙酰胆碱与内皮细胞上的毒蕈碱受体结合，激活一氧化氮合酶。

If you haven't heard of acetylcholine yet, you're gonna wanna remember that name.

如果你还没听说过乙酰胆碱，你会想记住这个名字的。

In both cases, the parasympathetic nerve fibers in the cavernosal spaces release acetylcholine from their nerve endings.

在这两种情况下，副交感神经纤维在海绵体间隙通过神经末梢释放乙酰胆碱。

The amount of choline in the diet influences how much acetylcholine is available in the brain and central nervous system.

饮食中胆碱的含量会影响大脑和中枢神经系统中乙酰胆碱的含量。

Binding of acetylcholine to its receptor activates a chain reaction in the muscle cell that ultimately results in muscle contraction.

ACh与其受体结合激活了肌肉细胞的连锁反应，最终导致肌肉收缩。