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The sequence of events
- Initially the cell is resting at around -70 mV.
- The cell becomes excited.
- Channels open and the membrane permiability to sodium is suddenly increase greatly.
- Sodium(Na+) rushes into the cell.
- Voltage-activated Potassium channels open.
- Permeability to Potassium (K+) increases slowly
- Positive charges accumulate within the cell.
- The membrane potential approaches the equilibrium potential for Sodium (E Na)
- Na channels close
- Conduction velocities vary over a range of 100x with the most rapid being faster than 100 m/sec. Nicholls, Martin and Wallace's From Neuron to Brain page 132.
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© 1995 Lance Hahn (firstname.lastname@example.org)