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Myelinated and Unmyelinated Fibres

Myelin sheath...

Question

Myelin sheath of nerve fibres is produced by

A

Axon

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B

Connective tissue

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C

Schwann cells

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D

Neuroglia

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Solution

The correct option is B Schwann cells
Myelin is a layered substance made of phospholipid, cholesterol and protein that covers the axons of the neurons.
It insulates the nerve impulses from the surrounding nerve fibres.
It also increases the speed of impulses through nerve axons.
It is formed in the central nervous system by glial cells called the oligodendrocytes.
Whereas, in the peripheral nervous system they are produced by Schwann cells.
So, the correct answer is 'Schwann cells'.

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