Node of Ranvier

At one end of an elongated structure is a branching mass. At the centre of this mass is the nucleus and the branches are dendrites. A thick axon trails away from the mass, ending with further branching which are labeled as axon terminals. Along the axon are a number of protuberances labeled as myelin sheaths.

Nodes of Ranvier, also known as myelin sheath gaps, are periodic gaps in the insulating myelin sheaths of myelinated axons where the axonal membrane is exposed to the extracellular space. Nodes of Ranvier are uninsulated and highly enriched in ion channels, allowing them to participate in the exchange of ions required to regenerate the action potential. Nerve conduction in myelinated axons is referred to as saltatory conduction (from the Latin saltare, to hop or leap) because of the manner in which the action potential seems to "jump" from one node to the next along the length of the axon.

单词	Nodes Of Ranvier
释义	Nodes Of Ranvier 英语百科 Node of Ranvier Nodes of Ranvier, also known as myelin sheath gaps, are periodic gaps in the insulating myelin sheaths of myelinated axons where the axonal membrane is exposed to the extracellular space. Nodes of Ranvier are uninsulated and highly enriched in ion channels, allowing them to participate in the exchange of ions required to regenerate the action potential. Nerve conduction in myelinated axons is referred to as saltatory conduction (from the Latin saltare, to hop or leap) because of the manner in which the action potential seems to "jump" from one node to the next along the length of the axon.
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Nodes Of Ranvier

Node of Ranvier