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I am Lyosha [343]
3 years ago
15

What is the substance that surrounds, coats, and protects nerve fibers in the brain and spinal cord?

Health
1 answer:
marshall27 [118]3 years ago
3 0

Answer:

Explanation:

Myelin is a lipid-rich (fatty) substance that surrounds nerve cell axons (the nervous system's "wires") to insulate them and increase the rate at which electrical impulses (called action potentials) are passed along the axon.

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