NEET PG DENTAL EXAM

Detailed explanation-1: -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. These glial cells are called Schwann cells, and they help to electrically insulate the neuron.

Detailed explanation-2: -The gaps between adjacent Schwann cells are called nodes of Ranvier.

Detailed explanation-3: -Answer and Explanation: A gap between Schwann cells in the peripheral system is called a node of Ranvier. This is important in saltatory conduction where the action potential propagation speed is much faster compared to continuous conduction.

Detailed explanation-4: -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).