What are the steps that lead to increased excitability in a neuron when ne is released presynaptically? G-protein in the membrane is activated when the NE receptor is attached to a receptor.
The action potential serves as the foundation for a neuron's excitability, or its capacity to produce a significant, fast shift in membrane voltage in response to a very minor input. The loss of the negative transmembrane potential due to an inward current of positive charges is caused by the action potential, which typically progresses to a positive transmembrane potential before swiftly repolarizing back to a negative transmembrane potential.
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