Question

Myelin sheath is derived from

• A. Neuroglial cells
• B. Schwann cells
• C. Nerve cells
• D. All of these

Answer 1

The correct option is B Schwann cells

• Myelin sheath is formed by oligodendrocytes in the CNS and by Schwann cells in the peripheral nervous system.
• These cells wrap layer upon layer of their own plasma membrane in a tight spiral around axon.
• The insulating layer checks the leakage of charge and lesser stoppage points (nodes of Ranvier) leading to acceleration of the conduction and conservation of the metabolic energy.
  

So, the correct option is 'Schwann cells'.