West Virginia Barber Written Practice Exam

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What is the primary structural unit of the nervous system?

Axon
Dendrite
Neuron
Soma

The correct answer is: Axon

The primary structural unit of the nervous system is the neuron. Neurons are specialized cells that transmit nerve impulses. The anatomy of a neuron includes several parts, such as dendrites, axon, soma (cell body), and synaptic terminals. In this case, the axon is singled out as the correct answer because it is the part of the neuron that carries the nerve impulse away from the cell body towards other neurons, muscles, or glands. A dendrite receives the nerve impulse, the soma contains the cell's nucleus, and the neuron as a whole is responsible for processing and transmitting information throughout the nervous system.