Signal transduction refers to the process of cellular communication that takes place between cells within an organism. This process involves the transfer of information from one cell to another through a variety of chemical messengers. There are several synonyms for the term "signal transduction," including cellular signaling, cell signaling, and intracellular signaling. Other terms used to describe this process include cell-to-cell communication, cell signaling pathways, and the transmission of signals across cell membranes. Regardless of the terminology used, signal transduction is a critical process that enables cells to respond to external stimuli and adapt to changing environmental conditions.