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Action Potential and Synapse (AP: abrupt delop. of membrane =…
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- VG Na+ Ch Open; Na+ enters = rising phase
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- Absolute Refractory Period: Na+ Ch close; end of rising phase
- K+ continue to exit = falling phase
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- rapid movement of NT from cleft by protein on term button
- NT against concentration gradient -> :explode: presynap cell terminal
- enzymes in cells then deactivate NT
NT can be taken up by:
- neurons that release it (ex: monoamine, MAO, DA, and 5-HT)
- neurons in vicinity
-nearby astrocytes