Multiple choice

Which of the following reasons supports this statement?

Regeneration of nerve is not possible in the central nervous system.

  1. Absence of neurilemma in neurons

  2. Absence of axon

  3. Absence of grey matter

  4. Absence of neuroglia in neurons

  5. Absence of myelinogenesis
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A Correct answer
Explanation

The myelin sheath layer has a cellular covering known as the neurilemma or the schwann cell sheath. The neurilemma is essential for regeneration of nerves. It is present only in the peripheral nervous system. There is no neurilemma in the central nervous system and this may be one reason why injuries to the brain and spinal cord do not heal very well.

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