Chapter8 Cell signaling o Cell signaling can affect virtually every aspect of cell structure and function t Activation of enzyme activity t Change in cytoskeletal organization t Change in ion permeability t Initiation of DNA synthesis t Activation or repression of gene expression Importance of Signal Transduction Development Apoptosis Transduction Cell Growth Immunology Metabolism❖Cell signaling can affect virtually every aspect of cell structure and function: Activation of enzyme activity;  Change in cytoskeletal organization;  Change in ion permeability;  Initiation of DNA synthesis;  Activation or repression of gene expression. Chapter 8 Cell Signaling