CBSE BOARD X, asked by wizardingminds, 11 months ago

1)WHAT IS NODE OF RANVEIR 2) WHAT IS SCHWANN CELLS 3) WHAT IS MYELIN SHEALTH AND ITS FUNCTION KINDLY GIVE EASY AND UNDERSTANDABLE ANSWERS

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Answered by Anonymous

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1.] Node of Ranvier :-

Node of Ranvier, periodic gap in the insulating sheath (myelin) on the axon of certain neurons that serves to facilitate the rapid conduction of nerve impulses. These interruptions in the myelin covering were first discovered in 1878 by French histologist and pathologist Louis-Antoine Ranvier, who described the nodes as constrictions.

2.] Myelin Sheath :-

Myelin is an insulating layer, or sheath that forms around nerves, including those in the brain and spinal cord. It is made up of protein and fatty substances. This myelin sheath allows electrical impulses to transmit quickly and efficiently along the nerve cells.

3.] Schwann cells :-

The Schwann cell plays a vital role in maintaining the peripheral nervous system (PNS). Schwann cells are derived from neural crest cells, and come in two types either myelinating or non-myelinating Schwann cells.

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