The most appropriate definition of neuroglial cells are that they are

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Nonsensory supporting cells

Secretory cells

Sensory cells

Sensory and supporting cells

answer is A.

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Detailed Solution

Concept: Specialised cells called neuroglial cells are present in the brain and spinal cord, where they nourish the CNS and PNS neurons and their fibres. The neural crest gives rise to most cells in the glial system.
Neuroglial cells make up around half of all brain cells. They come in two different types: macroglia and microglia, and they are not sensory. Macroglial cells control blood vessel and neuron function as well as the metabolism of the retina. The blood-CSF barrier is made up of cubical cells called ependymal cells. Their roles are unclear, and they are the subject of extensive research. They secrete the cerebrospinal fluid.
Hence, the correct answer is option 1.

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