BIOL 2021 Lecture 11: Lecture 11 – Cell Signaling chapter 15.docx
19 Apr 2015
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For example, the cells of multicellular organisms detect and respond to countless internal and extracellular signals that control their growth, division, and differentiation during developments, as well as their behavior in adult tissues: at the heart of all these communication systems are regulatory proteins that produce chemical signals, which are sent from one place to another in the body or within the cell, usually being processed along the way and integrated with other signals to provide clear and effective communication, the study of cell signaling has traditionally focused on the mechanisms by which eukaryotic cells communicate with each other using extracellular signal molecules such as hormones and growth factors, in this chapter, we describe the features of some of these cell cell communication systems, and we use them to illustrate the general principles by which any regulatory system, inside or outside the cell, is able to generate, process, and respond to signals.
