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

这种缺氧还会交感纤维死亡。

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

这些交感元可以使直肠收缩，并使肛门内括约肌松弛。

" Point" is erection and it's caused by " P, " or parasympathetic fibers.

“Point”代表勃起，它是由“P”交感（parasympathetic）纤维引起。

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

在这两种情况下，交感纤维在海绵体间隙通过末梢释放乙酰胆碱。

And, foils being what they are, the reverse is of course true for the parasympathetic system.

而且，交感系统情况正好和陪衬是相反。

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

如果产生热量足够强烈，身体交感系统就会被触发，从而产生放松反应。

Once the rectum is filled and stretched, signals travel to parasympathetic neurons in the spinal cord, initiating the defecation reflex.

当直肠被粪便填满并受到牵拉时，就会向脊髓内交感元发出信号，启动排便反射。

We have parasympathetic nervous system and our sympathetic nervous system.

我们有交感系统和交感系统。

But the nerve fibers of your parasympathetic system begin both above and below where the sympathetic ones do.

但是交感系统纤维是从交感上方和下方开始。

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

交感作用只是稍微抑制威胁反应。

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交感系统。

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

自主系统由交感和交感两部分组成。

This happens thanks to the parasympathetic division of the autonomic nervous system.

这要归功于自主系统交感分支。

We also see that the parasympathetic nervous system decreases heart rate, which decreases cardiac output.

我们还看到交感系统降低了心率，从而降低了心输出量。

And the other one talks you down and effectively undoes what its foil did. And that is the parasympathetic nervous system.

另一个会让你沮丧，有效地解除它衬托所起作用。那是交感系统。

The second half, that's the exhale, comes from your parasympathetic nervous system, which affects your ability to relax and calm down.

后半部分，呼气，交感系统发挥作用，影响放松和平静能力。

Damaged parasympathetic nerve fibers can't release acetylcholine, so there's less nitric oxide synthase activation, and less nitric oxide is produced.

受损交感纤维不能释放乙酰胆碱，因此被激活一氧化氮合酶较少，产生一氧化氮也较少。

Some drugs, like ones for overactive bladders or excessive sweating, target the entire parasympathetic nervous system.

有些药物，例如治疗膀胱过度活动症或过度出汗药物， 会针对整个交感系统。

Lastly, the nerve gives rise to: - Greater petrosal nerve, which then supplies parasympathetic fibres to mucous glands and lacrimal gland.

最后，产生：- 岩大，含交感分泌纤维，支配粘液腺和泪腺腺体分泌。

It stimulates your parasympathetic nervous system, the half of your nervous system responsible for activities like resting and digesting.

它会刺激您交感系统，这是负责休息和消化等活动系统一半。