It could be that that signal is 'you need more glucose', and so the cellular response is to create more glucose transporters to bring more glucose into the cell.

这信号还可能是,"需要更多葡萄糖",细胞的反馈就是,产生更多的葡萄糖载体,将更多的糖分子输送进细胞

耶鲁公开课 - 生物医学工程探索课程节选

It gets produced in response to a signal so there's a binding of a ligand to a receptor, the enzyme that does this conversion is activated and more cycle AMP is released.

这类分子的产生是对信号做出的一种反应,当配体和受体结合时,催化这种转化过程的酶被激活,更多的cAMP释放出来

耶鲁公开课 - 生物医学工程探索课程节选