PHYSIOLOGY
CENTRAL NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Grey matter consist of
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myelinated fibre
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cell bodies and unmyelinated fibre
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -The grey matter is mainly composed of neuronal cell bodies and unmyelinated axons. Axons are the processes that extend from neuronal cell bodies, carrying signals between those bodies.
Detailed explanation-2: -The correct answer is (a): Gray matter consists of cell bodies, dendrites, and unmyelinated axons. White matter gets its color from myelin, which is a white membranous wrapping around axons. Hence, gray matter appears gray due to the lack of white myelin.
Detailed explanation-3: -Myelinated fibers make up the white matter in the CNS, while cell bodies and unmyelinated fibers make the gray matter. The unmyelinated regions between the myelin segments are called the nodes of Ranvier.
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