NEET 2017 · BiologyPrevious Year Question
Myelin sheath is produced by
Answer: (A) Schwann Cells and Oligodendrocytes. Answer: (1) Schwann Cells and Oligodendrocytes.
- A.Schwann Cells and Oligodendrocytes✓
- B.Astrocytes and Schwann Cells
- C.Oligodendrocytes and Osteoclasts
- D.Osteoclasts and Astrocytes
Correct Answer
(A) Schwann Cells and Oligodendrocytes
Solution & Explanation
Answer: (1) Schwann Cells and Oligodendrocytes. Solution: The myelin sheath that insulates nerve fibres is formed by neuroglial cells — Schwann cells produce myelin around axons in the peripheral nervous system, while oligodendrocytes produce myelin in the central nervous system. Astrocytes and osteoclasts do not make myelin (osteoclasts are bone cells), so the other options are incorrect. NCERT (Class XI, Structural Organisation in Animals — Animal Tissues, pre-2023 rationalisation text): neural tissue — neuroglia (Schwann cells, oligodendrocytes).
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