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And though it may sound incredible, your body actually contains about a teaspoon's worth of this stuff formed thirteen billion years ago by the very first stars."
VOA: special.2010.09.29
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These systems are dispersed throughout your body and their dispersal is important, and so we'll talk about that as well.
这些系统分布于人体各处,而这种分散性很重要,我们也会讲到这一点
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The way that they appear in your body tells the immune system something about where they came from.
抗原在体内出现的方式,向免疫系统表明了抗原的来源
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But the great question is to keep your mind think about a possibility of the--body theory.
你们应该思考的最重要的问题,是肉体论的可能性。
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What we'll--later in the course we'll talk about how much of your body has been influenced by corn; how much of your diet is influenced by corn; how many products you touch in a given day have been derived in some way from corn.
我们会在以后的课堂上讲到,玉米对你身体有多少影响,玉米对你的日常饮食又有多少影响,一天之内你接触到的产品,有多少是由玉米加工而来的
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One of the things that happens is that certain cells within your body process the vaccine or the antigen and we talked about that.
在人体内,发生的反应之一是,特定的细胞对疫苗或者抗原做出反应,之前我们讨论过这个
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Your body is able to regulate your weight fairly well without you really thinking about it.
身体都能把体重控制的相当好,即使你从没想过体重的问题
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The nervous system, the endocrine system which we'll start talking about a little bit today is the system that's responsible for sending signals back and forth between tissues of your body.
还有神经系统,和我们今天将要提到的内分泌系统,内分泌系统主要负责,在体内各组织之间传递信号
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Its role is to move molecules around in the body so that they're available to cells everywhere within your body regardless of how close they are to your skin, and we'll talk about that.
它能将分子输送到身体各处,供体内所有的细胞使用,而无论那些细胞多么靠近体表,我们会讲到这些的
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I'll talk about what that means, encoding insulin means in a minute, but there's a gene that tells your body what insulin looks like and that gets transcribed but only in those cells that make insulin.
一会儿,我将会讨论基因编码胰岛素的意义,所有细胞都含有相同的胰岛素基因,它决定胰岛素的结构以及如何被转录,但是只有胰腺细胞才能产生胰岛素
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When you go from here to going outside, to going to a much hotter room, your temperature stays the same and your body is able to control this on your own, you don't have to think about it.
当你从这里走出去,去一个更热的房间的时候,你的体温不会变化,你的身体能自行控制体温,你无需要刻意想它
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Here, I've just picked a couple of the pictures that I showed you last time when we were talking about cell communication in the immune system, What happens after the vaccine is introduced into your body is that it initiates cellular events.
我挑选了,我上次给你们展示的几幅图片,当我们讨论到,免疫系统中的细胞沟通时,讲到过当人体接种疫苗之后,能够触发,细胞活动
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The other thing that I want to do today is try to tie this discussion on vaccines a little bit more closely with what we talked about last week, in terms of what happens inside your body when you receive a vaccine or when you're exposed to an antigen, and how the immune system actually responds to that.
还有就是,我希望可以,把今天关于疫苗的讨论,与我们上周讲过的内容,结合得更紧密一些,当接种疫苗,或者是接触抗原时,人体将会发生怎样的变化,以及免疫系统对疫苗产生何种应答
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Well I talked about it - earlier I've mentioned several times all the cells in my body, all the cells in your body have essentially the same genomic chromosomal DNA in their nucleus.
我之前有说过,我不只一次提到过,我体内的所有细胞,和你体内的所有细胞一样,核中的染色体基因组DNA本质上都相同
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