Ammonia and other toxins can pass through the blood brain barrier and cause hepatic encephalopathy.

氨和其他毒性产物可以通过大脑屏障，导致肝性脑病。

The blood brain barrier is the special name given to the blood vessels in the brain.

血脑屏障指的是大脑中得血管。

It's one of the main source of calories for the body, and is able to cross the blood brain barrier and nourish the brain.

它是人体能量的主要来源，并且可以通过血脑屏障，为大脑提供能量。

One thing that makes mercury especially dangerous is that it can cross the blood brain barrier and build up in the brain.

使汞特别危险的一件事是它可以穿过血脑屏障并在大脑中积聚。

Aminolevulinic acid, in particular, is the most likely culprit since it could cross the blood brain barrier and affect the central, autonomic, and peripheral nervous systems.

特别是氨基乙酰丙酸，是最可能的“嫌疑犯”，因为它可以跨越血脑屏障，影响中枢、自主和外周神经系统。

It normally starts when a foreign substance, oftentimes bacteria, makes its way inside the leptomeninges, either by by direct contact or hematogenous spread through the blood brain barrier.

它通常由于异物，有时是细菌，进入柔脑膜；可能是通过直接接触或透过血脑屏障进行血性传播。

Other immunosuppressants actually block T cells from getting into the brain by interfering with their cell surface molecules they use to gain passage through the blood brain barrier.

其它的免疫抑制剂通常阻断T淋巴细胞进入大脑，通过干扰它们用来通过血脑屏障的细胞表面蛋白。

Now, the brain, including the neurons in the brain, is protected from things in the blood by the blood brain barrier, which only lets certain molecules and cells through from the blood.

大脑及其中的神经元被血脑屏障保护免受血液里物质的损伤，因为血脑屏障只让血液中某些分子和细胞通过。

As a side note here, in comparison to Entacapone, Tolcapone can better penetrate the blood–brain barrier, and thus can act both in the central nervous system and in the periphery.

另一方面，与恩他卡彭相比，托卡彭能更好地穿透血液-大脑屏障，因此可以在中枢神经系统和周围发挥作用。

CSF analysis can also show an elevated protein concentration because the inflammation leads to a more permeable blood brain barrier, or BBB, which is a selective semipermeable barrier between the circulating blood and the central nervous system.

脑脊液检查也可有蛋白含量升高，由于炎症导致介于循环血流和中枢神经系统之间的半透膜屏障，即血脑屏障，通透性升高。

Peripheral dopa decarboxylase also exists, which can metabolize levodopa into dopamine before it gets through the blood brain barrier, and—via additional enzymes— metabolize it into other catecholamines like epinephrine, which can cause unwanted side effects like arrhythmias.

体内还有外周多巴脱羧酶，可以在左旋多巴穿过血脑屏障前将其转换为多巴胺；然后，通过其他酶将其转换为其他儿茶酚胺，如肾上腺素，它可以导致不良的副作用，如心律失常。

For immune cells like T and B cells that means having the right ligand or surface molecule to get through the blood brain barrier, this is kind of like having the a VIP pass to get into an exclusive club.

对于免疫细胞来说，比如T淋巴细胞和B淋巴细胞，有相合的配体或表面分子就可以通过血脑屏障，有点像拥有了VIP通行权才能进入私人俱乐部。