NERVOUS
NEUROGLIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Works to drain the charge.
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Produced by neuroglial cells.
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The main ingredient is protein.
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Found in axons 2 µm in size.
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Detailed explanation-1: -The length of the myelin sheath along the axon is approximately 1 mm in the PNS. Between two adjacent myelin segments, there are approximately 1-m-long gaps called nodes of Ranvier (Figure 1A and E).
Detailed explanation-2: -Myelin is an insulating layer, or sheath that forms around nerves, including those in the brain and spinal cord. It is made up of protein and fatty substances. This myelin sheath allows electrical impulses to transmit quickly and efficiently along the nerve cells. If myelin is damaged, these impulses slow down.
Detailed explanation-3: -An axon diameter of about 0.5 micron combined with a thickness of the myelin sheath of 0.3 micron was most often found in all 4 cases. The fibres showed a broad variation of myelin thickness. In a given group of the small axons the thickest myelin sheath exceeded 3 to 4 times the value of the thinnest one.