NEET 2002 Biology question

Which of the following statement is correct for node of Ranvier of nerve : -

(1)Neurilemma is discontinuous
(2)Myelin sheath is discontinuousCorrect
(3)Both neurilemma & Myelin sheath are discontinuous
(4)Covered by myelin sheath

Answer: (2)

Solution

A myelinated axon is wrapped by Schwann cells whose lipid-rich myelin sheath forms an insulating layer, but the sheath is interrupted at regular intervals; these gaps are the nodes of Ranvier. At the node the axon membrane is exposed, and the

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Question ID VK-089057