I mentioned a little bit that this membrane is not just lipid bilayer but there's also proteins that are inserted into the membrane.

我之前说过,这层膜不仅仅是一层脂质双分子层,而是有很多蛋白质嵌插在膜上的

耶鲁公开课 - 生物医学工程探索课程节选

There's lipid chains in between so cell membranes are lipid rich layers that can exist in water.

脂质链在两者中间,所以细胞膜是富含脂类的膜层,并可以稳定存在于水中

耶鲁公开课 - 生物医学工程探索课程节选

So, this is called the extracellular region or domain, this is the trans-membrane region or domain, and this is the cytoplasmic region or domain.

因此,这部分叫做胞外区,中间这部分叫做跨膜区,内部这一段叫做胞质区

耶鲁公开课 - 生物医学工程探索课程节选

The lipids will form a bi-layer where the water soluble part of the lipid points out of this layer and the oily part points in.

脂质会形成双层膜,水溶性部分朝向膜层外,而脂溶性的部分朝向双层膜内部

耶鲁公开课 - 生物医学工程探索课程节选

Then there's a part that's inside the cell sticking down into the cell cytoplasm.

然后还有部分穿过质膜,进入细胞内部,与细胞质相接触

耶鲁公开课 - 生物医学工程探索课程节选

I'll talk about biological membranes and lipids and how they're assembled.

我会讲到生物膜和脂质,及它们是如何组装成质膜的

耶鲁公开课 - 生物医学工程探索课程节选

We'll see why they have to separate that in a minute, but they do that these lipid bi-layers solve that problem for them and they're self-assembled structures from these molecules called phospholipids.

我们马上会讲到为什么要把它们隔离开,脂质双层膜解决了这个问题,而这些自主装结构,就是由磷脂分子组成的

耶鲁公开课 - 生物医学工程探索课程节选

In some cells they're recycled, that is the cell is able to take up the neurotransmitter after it's released and restore it, but most often there are enzyme systems inside the pre-synaptic membrane where those neurotransmitters are synthesized.

在一些细胞中神经递质可以循环利用,这些细胞可以吸收,已经释放出的神经递质并重新储存起来,但更常见的是突触前膜中含有酶系统,在此合成神经递质

耶鲁公开课 - 生物医学工程探索课程节选