Basics of Cell Signaling

• Use signaling to respond to environment

• Transduction pathways initiate transcription of target genes in the nucleus

• Results in proteins being made that cause the cell to respond appropriately to the signal

How Cells Respond to Signal Transduction

• Initiation of gene expression (making proteins)

• Causing the cell to grow and enter the cell cycle

• Stimulating cells to secrete molecules

• Initiation of cell death (apoptosis)