How Long Do Signaling Molecules Last?

The first step is synthesizing a release of signaling molecule generally by exocytosis or if it's a physical process like light or temperature, obviously that doesn't happen. But then the next step is transporting that signal to the target cell. How does the chemical signal get from the source to the target? Well, there's many different mechanisms by which that can occur. And it can be described as the different crimes. So intra-crying, auto-crying,. juxtapine, paracrine. You probably heard some of these terms before. Let's go through them and explain how they're relevant to this process of transporting the signal. All right. Now let's talk a