ANATOMY

Detailed explanation-1: -The gap between myelin sheath are called nodes of Ranvier. (c) The myelinated nerve fibres are enveloped with Schwann cells, which form a myelin sheath around the axon.

Detailed explanation-2: -Synapse – The junction between the axon of one neuron and the dendrite of another, through which the two neurons communicate.

Detailed explanation-3: -The nodes of Ranvier are characterized by short (1um), specialized regions in the axonal membrane that are not insulated by myelin. Although it is bare of myelin at the node, the axon is in direct contact with the microvilli of the Schwann cells in the PNS, or with processes of astrocytes in the CNS (Figure 1).

Detailed explanation-4: -The Nodes of Ranvier are the gaps between the myelin insulation of Schwann cells which insulate the axon of neuron. The Node of Ranvier is the 1-2 micrometre gap between the glial cells of the myelin sheath.