Question

what are the three functional classes of neurons?
check all that apply
motor neurons that send signals predominantly to muscle and gland cells.
schwann cells that envelop nerve fibers of the pns.
interneurons that lie between, and interconnect the incoming sensory pathways and the outgoing motor pathways of the cns
sensory neurons that are specialized to detect stimuli such as light, heat, pressure, and chemicals, and transmit information about them to the cns.
ependymal cells that produce cerebral spinal fluid.

Explanation:

Neurons are classified functionally. Motor neurons (efferent) send signals to muscles/glands. Interneurons (association) connect sensory and motor pathways in CNS. Sensory neurons (afferent) detect stimuli and send info to CNS. Schwann cells and ependymal cells are glial cells, not neurons.

Answer:

Motor neurons that send signals predominantly to muscle and gland cells.
Interneurons that lie between, and interconnect the incoming sensory pathways and the outgoing motor pathways of the CNS.
Sensory neurons that are specialized to detect stimuli such as light, heat, pressure, and chemicals, and transmit information about them to the CNS.