neurofibril

neu·ro·fi·bril

N0071530 (no͝or′ə-fī′brəl, -fĭb′rəl, nyo͝or′-)n. Any of the long, thin, microscopic fibrils that run through the body of a neuron and extend into the axon and dendrites.

neu′ro·fi′bril·lar′y (-brə-lĕr′ē) adj.

neurofibril

(ˌnjʊərəʊˈfaɪbrɪl) n (Anatomy) any of the delicate threads within the body of a nerve cell that extend into the axon and dendrites ˌneuroˈfibrilar, ˌneurofiˈbrillar, ˌneurofiˈbrillary adj

neu•ro•fi•bril

(ˌnʊər əˈfaɪ brəl, -ˈfɪb rəl, ˌnyʊər-)

n. a fibril of a nerve cell. [1895–1900] neu`ro•fi′bril•lar, neu`ro•fi′bril•lar′y, adj.

Neurofibril

enUK

neurofibril

[¦nu̇r·ō′fī·brəl] (neuroscience) A fibril of a neuron, usually extending from the processes and traversing the cell body.

Neurofibril

a microscopic filament that is found upon treatment of nerve cells—neurons—and the longest outgrowths of the nerve cells—axons—with silver salts and other reagents.

In the late 19th and early 20th centuries, neurofibrils were ascribed the function of conducting nerve impulses. This view proved to be erroneous when it was found that nerve impulses are conducted by the external membrane of the neuron. Electron microscopy revealed two kinds of longitudinal neurofibrils in the outgrowths of neurons: neurotubules and neurofilaments. Neurotubules are from 20 to 25 nm in diameter and are formed from the protein tubulin; they are believed to transport substances along the axon. The threadlike neurofilaments are formed from a protein similar to the muscle protein actin. Neurofilaments are especially numerous in the movable terminal portions of growing axons.

neurofibril

[noor″o-fi´bril] one of the delicate threads running in every direction through the cytoplasm of a nerve cell, extending into the axon and dendrites.

neu·ro·fi·bril

(nū'rō-fī'bril), A filamentous structure seen with the light microscope in the nerve cell's body, dendrites, axon, and sometimes synaptic endings, as aggregations of much finer ultramicroscopic elements, the neurofilaments and microtubules; their functional significance remains to be established.

neurofibril

(no͝or′ə-fī′brəl, -fĭb′rəl, nyo͝or′-)n. Any of the long, thin, microscopic fibrils that run through the body of a neuron and extend into the axon and dendrites.

neu′ro·fi′bril·lar′y (-brə-lĕr′ē) adj.

neu·ro·fi·bril

(nūr'ō-fī'bril) A filamentous structure seen with the light microscope in the body, dendrites, axons, and sometimes synaptic endings of a nerve cell.

单词	neurofibril
释义	neurofibril enUK neu·ro·fi·bril N0071530 (no͝or′ə-fī′brəl, -fĭb′rəl, nyo͝or′-)n. Any of the long, thin, microscopic fibrils that run through the body of a neuron and extend into the axon and dendrites. neu′ro·fi′bril·lar′y (-brə-lĕr′ē) adj. neurofibril (ˌnjʊərəʊˈfaɪbrɪl) n (Anatomy) any of the delicate threads within the body of a nerve cell that extend into the axon and dendrites ˌneuroˈfibrilar, ˌneurofiˈbrillar, ˌneurofiˈbrillary adj neu•ro•fi•bril (ˌnʊər əˈfaɪ brəl, -ˈfɪb rəl, ˌnyʊər-) n. a fibril of a nerve cell. [1895–1900] neu`ro•fi′bril•lar, neu`ro•fi′bril•lar′y, adj. Neurofibril enUK neurofibril [¦nu̇r·ō′fī·brəl] (neuroscience) A fibril of a neuron, usually extending from the processes and traversing the cell body. Neurofibril a microscopic filament that is found upon treatment of nerve cells—neurons—and the longest outgrowths of the nerve cells—axons—with silver salts and other reagents. In the late 19th and early 20th centuries, neurofibrils were ascribed the function of conducting nerve impulses. This view proved to be erroneous when it was found that nerve impulses are conducted by the external membrane of the neuron. Electron microscopy revealed two kinds of longitudinal neurofibrils in the outgrowths of neurons: neurotubules and neurofilaments. Neurotubules are from 20 to 25 nm in diameter and are formed from the protein tubulin; they are believed to transport substances along the axon. The threadlike neurofilaments are formed from a protein similar to the muscle protein actin. Neurofilaments are especially numerous in the movable terminal portions of growing axons. neurofibril enUK neurofibril [noor″o-fi´bril] one of the delicate threads running in every direction through the cytoplasm of a nerve cell, extending into the axon and dendrites. neu·ro·fi·bril (nū'rō-fī'bril), A filamentous structure seen with the light microscope in the nerve cell's body, dendrites, axon, and sometimes synaptic endings, as aggregations of much finer ultramicroscopic elements, the neurofilaments and microtubules; their functional significance remains to be established. neurofibril (no͝or′ə-fī′brəl, -fĭb′rəl, nyo͝or′-)n. Any of the long, thin, microscopic fibrils that run through the body of a neuron and extend into the axon and dendrites. neu′ro·fi′bril·lar′y (-brə-lĕr′ē) adj. neu·ro·fi·bril (nūr'ō-fī'bril) A filamentous structure seen with the light microscope in the body, dendrites, axons, and sometimes synaptic endings of a nerve cell.
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