35.Node of Ranvier occurs where A. Nerve is covered with myelin sheath B. Neurilemma is discontinuous C. Neurilemma & myelin sheath are discontinuous D. Myelin sheath is discontinuous
Option D. myelin sheath is discontinuous Myelinated Nerve Fibers are nerve fibers that are insulated by a myelin sheath. Nodes of Ranvier occurs where myelin sheath is discontinuous. Nodes of Ranvier are microscopic gaps (which makes the myelin sheath discontinuous) found within myelinated axons, which helps to speed up propagation of action potentials along the axon via saltatory conduction.
