Another example of a synthesis reaction is the formation of sodium chloride (table salt). Because of the very high reactivities of sodium metal and chlorine gas, this reaction releases a tremendous amount of heat and light energy.
Schwann cells make myelin in the peripheral nervous system (PNS: nerves) and oligodendrocytes in the central nervous system (CNS: brain and spinal cord). In the PNS, one Schwann cell forms a single myelin sheath (Figure 1A).
Many glial cells lined up along an axon are required to fully myelinate and insulate a long nerve cell. The composition of myelin is approximately 30 percent protein, 27 percent cholesterol and 43 percent phospholipid.Myelin production is absolutely dependent on cholesterol synthesis in the glial cells.n your brain and nerve tissue, cholesterol is required for the formation of the myelin sheath, a fatty material that surrounds long portions of nerve fibers. Myelin insulates nerve cells and enhances the passing of electrical signals throughout your nervous systemâs circuitry.