Molecule Signal Transduction Pathways Diagram Poster
Signal transduction is the process by which an extracellular signalling molecule activates a membrane receptor, that in turn alters intracellular molecules creating a response. There are two stages in this process: a signalling molecule activates a certain receptor on the cell membrane, causing a second messenger to continue the signal into the cell and elicit a physiological response. In either step, the signal can be amplified, meaning that one signalling molecule can cause many responses.
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