Electrical Signaling Through Changes in Membrane Potential - Propagation of Action Potentials - Propagation of Action Potentials in Unmyelinated Axons
3 important questions on Electrical Signaling Through Changes in Membrane Potential - Propagation of Action Potentials - Propagation of Action Potentials in Unmyelinated Axons
Why do action potentials - unlike graded potentials - not get smaller as they travel?
the current spread to the adjacent membrane is always enough to depolarize the neighbouring membrane to threshold.
what determines how quickly a current spreads?
The diameter of the axon.
how does an action potential move in one direction only?
As the portion of the membrane closer to the axon hillock is still in the refractive state no action potential can be generated there.
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