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Which of the following statements is correct for ‘nodes of Ranvier’ of nerve?

1. Neurilemma is discontinuous
2. Myelin sheath is discontinuous
3. Both neurilemma and myelin sheath are discontinuous
4. Covered by myelin sheath

Correct answer: Myelin sheath is discontinuous

Solution

Nodes of Ranvier are the small gaps between adjacent myelin segments along a nerve fiber. Therefore, the myelin sheath is discontinuous at these points, which helps impulses jump from node to node.

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