When a certain enzyme is activated inside cells, ATP gets converted into a molecule called cyclic AMP, and cyclic AMP is an example of one of these molecules called second messengers.

细胞内的某种酶被激活后,ATP就能转化为一种叫cAMP的分子,cAMP是一种第二信使分子的范例

耶鲁公开课 - 生物医学工程探索课程节选

If another receptor operating from a different ligand does the same thing, generates an enzyme which causes cyclic AMP to increase, the rate of cyclic AMP increase is going to go up faster than if only one of these was activated.

如果受另一种配体激活的受体,能够完成相同的过程,即激活一种能够促进cAMP生成的酶,cAMP的生成速率会比,只有其中之一被激活时更加快

耶鲁公开课 - 生物医学工程探索课程节选

There's no change in them, and then we also looked at some at non-state functions, work and heat, and saw that those aren't zero going around a cycle. Of course you can do work in a cyclic process, and heat can be exchanged with the environment at the same time.

它们不会有变化，然后我们研究了,一些非态函数，功和热量，并看到,沿着循环行进一周的话,它们并不是零，当然你可以在,一个循环过程中做功，而同时热量可以在系统,与外界环境之间进行交换。

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Now you start a process, a cyclic process, where the first step in the process is denaturing the DNA.

然后你就可以开始一个循环步骤,第一步是使DNA变性

耶鲁公开课 - 生物医学工程探索课程节选