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Cell Communication (Chpt. 11)

Explore the fascinating world of cell communication and signaling pathways. From signal reception to response, unlock the mechanisms that cells use to communicate and coordinate essential functions.

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Cell Communication (Chpt. 11)

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  1. Cell Communication (Chpt. 11) Chapter 11

  2. Overview of Cell Signaling • Signaling evolved early in history of life • Communicating cells may be close together or far apart • 3 stages of signaling are: reception, transduction, and response

  3. Communicating cells

  4. Signal Reception and the Initiation of Transduction • A signal molecule binds to a receptor protein, causing the protein to change shape • Most signal receptors are plasma membrane proteins

  5. http://www.blackwellpublishing.com/matthews/rhodopsin.html

  6. Signal Transduction Pathways • Pathways relay signals from receptors to cellular responses • Protein phosphorylation, is a major mechanism of signal transduction • Certain small molecules and ions are key components of signaling pathways (second messengers)

  7. Cellular Responses to Signals • In response to a signal, a cell may regulate activities in the cytoplasm or transcription in the nucleus • Elaborate pathways amplify and specify the cell’s response to signals

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