What is the difference between myelinated and nonmyelinated nerve fibres?

What is the difference between myelinated and nonmyelinated nerve fibres?
  1. Myelinated nerve fibres have a myelin sheath while nonmyelinated do not
  2. Nonmyelinated nerve fibres have a myelin sheath while myelinated do not
  3. Both myelinated and nonmyelinated nerve fibres have a myelin sheath
  4. Both myelinated and nonmyelinated nerve fibres do not have a myelin sheath

Solution

Myelinated nerve fibres are enveloped with Schwann cells, which form a myelin sheath around the axon. Nonmyelinated nerve fibres are enclosed by a Schwann cell that does not form a myelin sheath around the axon.

Asked in: NCERT

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