NERVOUS
NEUROGLIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which two types of cells produce myelin coverings around the nerves?
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Microglia and astrocytes
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Schwann cells and satellite cells
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Schwann cells and oligodendrocytes
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Oligodendrocytes and astrocytes
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Explanation:
Detailed explanation-1: -The myelin membranes originate from and are a part of the Schwann cells in the peripheral nervous system (PNS) and the oligodendroglial cells in the central nervous system (CNS) (see Chap. 1). Each myelin-generating cell furnishes myelin for only one segment of any given axon.
Detailed explanation-2: -Schwann cells, also called neurolemmocytes, have two structural types. They may form a thick myelin sheath, or an indented plasma membrane that folds around peripheral axons in the PNS. Where a Schwann cell covers an axon, the outer cell surface is called the neurilemma. This shields the axon from interstitial fluids.
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