Which statement describes gray matter?

Which statement describes gray matter?

• A. Contains neuron cell bodies
• B. Contains myelinated axons
• C. Contains autonomic neurons
• D. Contains sensory fibers only

Answer: (A)

Gray matter is the region of the CNS where neurons are organized for processing information, rich in neuron cell bodies, dendrites, and synapses. Its characteristic gray color comes from the high density of cell bodies and unmyelinated fibers, unlike white matter, which is dominated by myelinated axons that transmit signals quickly. The defining feature is the presence of neuron cell bodies, which is why describing gray matter as containing neuron cell bodies is the best fit. While there can be autonomic neurons within gray matter and sensory pathways interact there, the crucial point is that gray matter is where the neuronal cell bodies and synaptic processing sit, whereas white matter is the highways of myelinated axons.

Gray matter is the region of the CNS where neurons are organized for processing information, rich in neuron cell bodies, dendrites, and synapses. Its characteristic gray color comes from the high density of cell bodies and unmyelinated fibers, unlike white matter, which is dominated by myelinated axons that transmit signals quickly. The defining feature is the presence of neuron cell bodies, which is why describing gray matter as containing neuron cell bodies is the best fit. While there can be autonomic neurons within gray matter and sensory pathways interact there, the crucial point is that gray matter is where the neuronal cell bodies and synaptic processing sit, whereas white matter is the highways of myelinated axons.