Question

write an account writing for a visit from your school to the Nehru science centre, for for the science exhibition (Include date, what time you went, which classes accompanied, what all you saw,how was the experience, what all you learnt)​

Answer 1

Myelin sheath is discontinuous because of the presence of nodes of Ranvier. Nodes of Ranvier, the periodic gap in the insulating sheath (myelin) on the axon of certain neurons that serves to facilitate the rapid conduction of nerve impulses. However, nodes of Ranvier interrupt the insulation at intervals, and this discontinuity enables impulses to jump from node to node in a process known as saltatory conduction. Whereas neurolemma is the outermost nucleated cytoplasmic layer of Schwann cells (also called neurolemmocytes) that surrounds the axon of the neuron. Thus, the correct answer is option B.