NERVOUS
NEUROGLIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Ependymal cells
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Satellite cells
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Oligodendrocytes
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Schwann cells
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Detailed explanation-1: -Each myelin sheath is formed by the concentric wrapping of an oligodendrocyte (CNS) or Schwann cell (PNS) process (a limb-like extension from the cell body) around the axon. Myelin reduces the capacitance of the axonal membrane.
Detailed explanation-2: -To act as an electric insulator, the myelin sheath is formed as a multilamellar membrane structure by the spiral wrapping and subsequent compaction of the oligodendroglial plasma membrane around central nervous system (CNS) axons.
Detailed explanation-3: -In the central nervous system (CNS)-the brain and spinal cord-cells called oligodendrocytes wrap their branch-like extensions around axons to create a myelin sheath.
Detailed explanation-4: -Note that the myelin sheath has a lamellated structure and is surrounded by Schwann cell cytoplasm.