1.

Node of Ranvier occurs where : (A) Nerve is covered with myelin sheath (B) Neurilemma is discontinuous (C) Neurilemma and myelin sheath are discontinuous (D) Myelin sheath is discontinuous 

Answer»

Correct option (D) Myelin sheath is discontinuous

Explanation:

Axon may or may not be covered by a fatty sheath called myelin sheath. This covering is missing at intervals. These gaps are known as Nodes of Ranvier.



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