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

这就是你的交系统更成熟的同父异母兄弟——副交系统的用武之地。

This hypoxia also causes the parasympathetic nerve fibers to die off.

这缺氧还会导致副交纤维死亡。

This is otherwise known as a sympathetic nervous system response, or the fight-or-flight reflex.

这也被称为交系统反应，或战斗/逃跑反应。

It's unclear whether the same sympathetic nerves make us gray as we age.

目前尚不清楚交是否也会让我们的头发随年。

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

当这情况发生时，我们的交系统会触发战斗或逃跑反应。

These parasympathetic neurons make the rectum contract and the internal anal sphincter relax.

这些副交元可以使直肠收缩，并使肛门内括约肌松弛。

Finally the first thoracic nerve root or T1 provides sympathetic innervation for the head, neck, and eyes.

最后，第一条胸根（T1）含有交，支配头部、颈部与眼。

Normally, these sympathetic nerves help to dilate the pupil, raise the eyelid, and help stimulate the sweat glands.

正常情况下，这些交能扩瞳、提上眼睑，以及协助刺激汗腺。

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系统的紧张刺激。

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

在这两情况下，副交纤维在海绵体间隙通过末梢释放乙酰胆碱。

The sympathetic nervous system is made up of a collection of nerves that extend through the body, including the skin.

交系统由遍布身体的组成，包括皮肤。

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，从而激活交系统，引发你的“战或逃”反应。

We have parasympathetic nervous system and our sympathetic nervous system.

我们有副交系统和交系统。

If the heat generated is intense enough, the body's parasympathetic nervous system is triggered, which creates a relaxation response.

如果产生的热量足够强烈，身体的副交系统就会被触发，从而产生放松反应。

The Autonomic system consists of the sympathetic and the parasympathetic divisions.

自主系统由交和副交两部分组成。

Okay, Dr. Karev, if we're gonna stop her blushing, we have to expose the sympathetic ganglion chain which resides where?

好了，Karev 医生，如果我们要阻止她脸红就要暴露交结，在哪里？

The parasympathetic is coming in to just tamp down the threat response a little bit.

副交的作用只是稍微抑制威胁反应。

Now, at the first thoracic nerve root or T1, you've got sympathetic nerves that supply the head, neck and eyes.

同时，交纤维，从第一胸髓根或T1发出，支配你的头、颈和双眼。

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

然后递质提醒交系统知到的威胁。

Then, the prefrontal cortex takes over from the amygdala and stimulates the parasympathetic nervous system.

然后，前额叶皮层接管杏仁核并刺激副交系统。