Which of the following statements is correct for node of Ranvier of nerve ?

Options

A. Axolemma is discontinuous
B. Myelin sheath is discontinuous
C. Both neurilemma and myelin sheath are discontinuous
D. Covered by myelin sheath

Answer

B

Explanation

Neurons are the chief functional units of the nervous system. An ordibary neuron has a soma or cyton and a long thread and, called as axon which is enclosed in a multilayerd myelin sheath. The myelin sheath is interrupted at the spaces between Schwann cells to form gaps. These gaps are called nodes of Ranvier. These nodes and teh myelin sheath create condition that speed up the nerve impulses.