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What is the primary feature of a neuron that prevents the action potential from traveling back from where it just passed?
Wiki User
∙ 12y ago
Antidromic conduction, or the process of an action potential traveling backwards, is possible. However, regardless of the direction of the action potential, it is propagated by voltage-gated ion channels. Whenever these channels open, there is a sudden exchange of ions, after which the channels snap shut. During this period, known as the refractory period, the channels will not reopen, and thus an action potential will not be able to reverse direction.
Wiki User
∙ 12y ago
The presence of voltage-gated sodium channels in the neuron membrane is the primary feature that prevents the action potential from traveling back, as these channels temporarily become inactivated after opening during depolarization. This inactivation prevents the movement of sodium ions back through the channel in the opposite direction.
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