One of the two divisions of your autonomic nervous system is called the sympathetic system.

你的自主神经系统的两个部分之一叫做交感神经系统。

Adderall also causes the release of norepinephrine, which activates the sympathetic nervous system, initiating your fight-or-flight response.

Adderall 还会导致去甲肾上腺素的释放，从而激活交感神经系统，引发你的“战或逃”反应。

We'll start that next week, with a white-knuckle ride through your sympathetic nervous system.

下周我们将开始先体验一下你交感神经系统的紧张刺激。

So it was called the sympathetic system, from the Greek words for " feeling together."

所以它被称为交感系统，来自希腊语中的“感觉在一起”。

The key here is that, in the sympathetic system, the preganglionic fibers are much shorter than the postganglionic ones.

这里的关键是，在交感神经系统中，节前纤维比节后纤维短得多。

The HPA Axis is essentially the endocrine system's companion to the sympathetic nervous system.

HPA 轴本质上是内分泌系统与交感神经系统的伴侣。

One of them is dedicated to amping you up and preparing you for activity — that's your sympathetic nervous system.

其中一个专门为你兴奋，让你为活动做好准备——那是你的交感神经系统。

Neurotransmitters then alert the sympathetic nervous system of the perceived threat.

然后神经递质提醒交感神经系统感知到的威胁。

We have parasympathetic nervous system and our sympathetic nervous system.

我们有副交感神经系统和交感神经系统。

When this happens, our sympathetic nervous system triggers a fight-or-flight response.

当这种情况发生时， 我们的交感神经系统会引发战斗或逃跑反应。

It's part of our sympathetic nervous system, so we'll breathe.

它是我们交感神经系统的一部分， 所以我们会呼吸。

Stress activates your sympathetic nervous system, which increases your heart rate and moderates your blood pressure using a hormone called cortisol.

压力会激活交感神经系统，利用一种叫皮质醇的激素增加心率及缓和血压。

Therefore, we see that the sympathetic nervous system increases heart rate, which increases cardiac output.

因此，我们看到交感神经系统会增加心率，从而增加心输出量。

When the amygdala perceives danger, it stimulates the sympathetic nervous system, which triggers the release of adrenaline.

当杏仁核感知到危险时， 它会刺激交感神经系统，从而触发肾上腺素的释放。

Now, other drugs can stimulate the sympathetic nervous system, responsible for your body’s fight or flight response.

现在，其他药物可以刺激交感神经系统， 负责您身体的战斗或逃跑反应。

The hypothalamus responds by sending signals out through the sympathetic nervous system to the sweat glands in your skin.

下丘脑通过交感神经系统向皮肤的汗腺发出信号来做出反应。

So, when you're under some sort of stress, like playing a competitive sport like badminton, the sympathetic nervous system kicks into action.

因此，当人处于一定压力之下时，比如打羽毛球这种竞技运动时，交感神经系统被激活。

But peeing also triggers the sympathetic nervous system, which is involved in other involuntary processes like the fight-or-flight response.

但小便也会触发交感神经系统， 该系统参与其他非自愿过程，如战斗或逃跑反应。

But you also need a burst of that sympathetic system to excite you, and keep you excited.

但是你也需要一个交感系统的爆发来激发你，让你保持兴奋。

That is where your sympathetic system's more mellow half-brother, the parasympathetic system comes in.

这就是你的交感神经系统更成熟的同父异母兄弟——副交感神经系统的用武之地。