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As Na ions enter the cell, the membrane potential is further depolarized, and more voltage-gated sodium channels are activated.

Such a process is also known as a positive feedback loop.

Cellular neuroscience is the study of neurons at a cellular level.

This includes morphology and physiological properties of single neurons.

An action potential can be divided into several sequential phases: threshold, rising phase, falling phase, undershoot phase, and recovery.

Following several local graded depolarizations of the membrane potential, the threshold of excitation is reached, voltage-gated sodium channels are activated, which leads to an influx of Na ions.

The Hodgkin–Huxley model of an action potential in the squid giant axon has been the basis for much of the current understanding of the ionic bases of action potentials.

These vesicles are pooled together in terminal boutons of the presynaptic neuron.

Moreover, the distinctions based on function between neurons and other cells such as cardiac and muscle cells are not helpful.

Thus, the fundamental difference between a neuron and a nonneuronal cell is a matter of degree.

Neurons are diverse with respect to morphology and function.

Thus, not all neurons correspond to the stereotypical motor neuron with dendrites and myelinated axons that conduct action potentials.

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