The area of a neuron where most neural impulses begin that has a higher concentration of sodium channels than the cell body or dendrite is a:

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Quizplus · Accepted Answer

The trigger zone is the region of the neuron where most of the neural impulses begin. It has a higher concentration of sodium channels which makes it easier for the impulses to start. The axon is the long, tail-like extension of the neuron that transmits the impulse, but it does not necessarily have a higher concentration of sodium channels than the trigger zone. The synapse is the gap between neurons where signals are transmitted, and the Schwann cell is a type of glial cell that supports and insulates neurons. The node of Ranvier is a gap in the myelin sheath of the axon that allows for saltatory conduction of nerve impulses, but it is not where most impulses begin.

The Area of a Neuron Where Most Neural Impulses Begin