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AP Biology UNIT 4 Cell Communication 4.3 Signal Transduction Pathways Video
Signal transduction pathways are basically the cell’s version of reacting to notifications. A signal—usually a ligand—shows up and binds to a receptor, which is like hitting the doorbell. Once that receptor flips “on,” it kicks off a whole internal relay of proteins passing the message along, amplifying it at each step like a drama-filled group chat. This cascade eventually reaches the nucleus or other cellular targets, telling the cell what move to make: divide, chill out, activate enzymes, wha
8th - 12th
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