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Neuroscience · Lecture 07Action potentials

my notes

resting neuron ≈ −70 mV

Na+ gates open → charge rises fast

K+ exits to reset the membrane

signal keeps moving down axon

A signal is a controlled wave of charge

At restThe membrane holds a negative charge near −70 mV.
RisingSodium channels open and Na+ rushes into the cell.
ResettingPotassium leaves, returning the membrane toward rest.

Generated hand-drawn illustration of an action potential traveling along a neuron — Generated from the original notes