AP Biology

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AP Biology

• Cell Communication (Signaling)
• Part 1

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Direct Contact
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Local and Long Distance within an organism.
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Phermones
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Earl Sutherland
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Step 1 Reception
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Step 2 Transduction
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Step 3 Response
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See the CONFORMATION SHAPE CHANGE by the receptor
protein caused by the ligand binding.
Gate closed
Signal molecule (ligand)
Ions
Plasma membrane
Ligand-gated ion channel receptor
Gate open
Cellular response
Gate closed