| 释义 |
node of Ranvier
noun[ C ]
anatomy specializeduk /ˈnəʊd əv ˈrɒn.viː.eɪ/ us /ˈnoʊd əv rɑːn.viːˈeɪ/
one of the spaces in the myelin sheath(= a layer that surrounds and protects a nerve) that exist at regular distances along a nerve:
Myelin is a spiral of specialized cell membrane that surrounds axons, except for small gaps - the nodes of Ranvier.
The exposed areas are called nodes of Ranvier and they contain very high densities of sodium channels.
Neurofibrillar degeneration occurs for a minimum of two to three nodes of Ranvier proximal to the point of injury.
The small, uncovered areas of axon between Schwann cells are called nodes of Ranvier.
When nerve fibres are cut across, the central ends of the fibres degenerate as far as the first node of Ranvier.
SMART Vocabulary: related words and phrases
Substances & structures in the body
abductor
accessorius
ACL
actin
adductor
fundus
funiculus
fusiform
glomerular
glomerulus
myosin
navicular
neuroendocrine
neurohormonal
neurohormone
tendinous
tendinum
tendo
tensor
Th
You can also find related words, phrases, and synonyms in the topics:
The brain & nervous system
|