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 Myelinated nerve fibres are found in

Option: 1

Spinal nerves


Option: 2

Cranial nerves


Option: 3

Autonomic nervous system


Option: 4

Both a and b


Answers (1)

best_answer

 

 

A Revision of Neuron -

Neuron As Structural And Functional Unit Of Neural System - A Revision of Neuron

 

  • There are two types of axons, namely, myelinated and unmyelinated.
  • The myelinated nerve fibres are enveloped with Schwann cells, which form a myelin sheath around the axon. 
  • The gaps between two adjacent myelin sheaths are called nodes of Ranvier.
  • Myelinated nerve fibres are found in spinal and cranial nerves. 
  • Unmyelinated nerve fibre is enclosed by a Schwann cell that does not form a myelin sheath around the axon and is commonly found in autonomous and the somatic neural systems.

 

-Hence, the correct option is d

 

Posted by

Deependra Verma

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