Cell Signaling Ligand (primary Some of the basic messenger) characteristics of Receptor CYTOSOL cell signaling: (①Receptor-.-ligand binding Cell must respond 3) Cellular responses appropriately to NUCLEUS external stimuli to ②Signal transduction survive; (via second YX messengers) (4Changes in Cells respond to gene expression stimuli via cell Figure 10-2 The Overall Flow of Information During Cell Signaling. Binding of ligand by a receptor activates a series of events known as signal signaling. transduction,which relays the signal to the interior of the cell,resulting in specific cellular responses and/or changes in gene expression. This document is produced by trial version of Print2Flash.Visit www.print2flash.com for more information