Final answer:
The statement that unipolar neurons are located in the eye and nasal cavity is NOT true; unipolar (pseudounipolar) neurons are sensory neurons found in the peripheral nervous system.
Step-by-step explanation:
The statement about unipolar neurons that is NOT true is that they are located in the eye and nasal cavity. Unipolar neurons, which are more accurately termed 'pseudounipolar' in humans, are exclusively sensory neurons and are found in the peripheral nervous system rather than in the eye or nasal cavity. These neurons have a single process that extends from the soma, but this process splits into two branches, functioning like an axon and a dendrite. These specialized structures allow the neurons to transmit sensory information from the periphery to the central nervous system. Unipolar neurons, as they are found in invertebrates, are not the structural type of neurons characterized by a distinct process from the soma, often stimulating muscles or glands.