The movement of ions across the neuronal membrane generates an electrical signal called [[1]], which allows information to be transmitted between neurons and throughout the nervous system. 

The movement of ions across the neuronal membrane generates an electrical signal called an action potential, which allows information to be transmitted between neurons and throughout the nervous system.

An action potential is a brief, rapid, and all-or-nothing change in the membrane potential of a neuron. It is triggered by the opening of voltage-gated ion channels, particularly sodium (Na+) and potassium (K+) channels, in response to a depolarizing stimulus. As Na+ ions rush into the neuron, the membrane potential rapidly depolarizes, reaching a threshold that triggers the opening of additional Na+ channels and the rapid influx of more Na+ ions. This causes a positive feedback loop that leads to a rapid and massive depolarization of the membrane potential, resulting in the generation of an action potential.

Once an action potential is generated, it propagates along the axon of the neuron and is able to transmit information over long distances. This is due to the opening of voltage-gated Na+ and K+ channels at each segment of the axon membrane as the action potential moves forward. The opening of these channels is triggered by changes in the membrane potential that result from the influx of Na+ ions at the previous segment of the axon. This process continues until the action potential reaches the end of the axon, where it triggers the release of neurotransmitters into the synapse to communicate with other neurons or target cells.