BRAIN
SPINAL CORD
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Myelinated dendrite
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Non myelinated dendrite
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Myelinated axon
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Non myelinated axon
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Detailed explanation-1: -White matter is composed of bundles of myelinated nerve cell processes or axons. The axons connect various grey matter areas of the brain to each other and carry nerve impulses in-between neurons.
Detailed explanation-2: -White matter: composed of bundles of axons. These axons are coated with myelin, a mixture of proteins and lipids, that helps conduct nerve signals and protect the axons. White matter conducts, processes, and send nerve signals up and down the spinal cord.
Detailed explanation-3: -The white matter of the spinal cord is subdivided into dorsal (or posterior), lateral, and ventral (or anterior) columns, each of which contains axon tracts related to specific functions. The dorsal columns carry ascending sensory information from somatic mechanoreceptors (Figure 1.11B).