The node of Ranvier is seen in -

Nodes of Ranvier are periodic gaps in the myelin sheath on the axon. A neuron is a functional unit (the basic unit of nervous tissue). It is specialized for the function of reception, integration and transmission of information in the body, The basic structure of a neuron is best studied in a spinal motor neuron, This cell has a ‘cell body (soma)' with 5-7 small processes called ‘dendrites'. There is a long process called ‘axon’ that originate from “axon hillock (A thickened area of cell body from which axon originates)”. The first portion of the axon is called “initial segment”. In a motor neuron, the axon hillock and the initial segment of axon have the lowest threshold for excited