Final answer:
Unipolar, bipolar, and multipolar are terms used to classify different types of neurons.
Step-by-step explanation:
While there are many defined neuron cell subtypes, neurons are broadly divided into four basic types: unipolar, bipolar, multipolar, and pseudounipolar. Unipolar neurons have only one structure that extends away from the soma. Bipolar neurons have one axon and one dendrite, while multipolar neurons have one axon and multiple dendrites. Pseudounipolar cells have a single process that extends from the soma and later branches into two distinct structures.