| 释义 |
axon
ax·on A0556800 (ăk′sŏn′) also ax·one (-sōn′)n. The usually long process of a nerve fiber that generally conducts impulses away from the body of the nerve cell.
[Greek axōn, axis.]
ax′on·al (ăk′sə-nəl, ăk-sŏn′əl) adj.axon (ˈæksɒn) or axonen (Biology) the long threadlike extension of a nerve cell that conducts nerve impulses from the cell body. Compare dendrite[C19: via New Latin from Greek: axis, axle, vertebra] ˈaxonal, axˈonic adjax•on (ˈæk sɒn)
n. the appendage of a neuron that transmits impulses away from the cell body. [1835–45; < New Latin < Greek áxōn an axle, axis; akin to Latin axis] ax′on•al (-sə nl, -ˌsɒn l) adj. ax·on (ăk′sŏn′) The long portion of a nerve cell that carries impulses away from the body of the cell. Also called nerve fiber.axonThe extension of a neuron, taking impulses away from the cell body.Thesaurus| Noun | 1. |  axon - long nerve fiber that conducts away from the cell body of the neuronaxonenerve fiber, nerve fibre - a threadlike extension of a nerve cellnerve cell, neuron - a cell that is specialized to conduct nerve impulsesnerve end, nerve ending - the terminal structure of an axon that does not end at a synapse |
Translationsaxon
axon: see nervous systemnervous system,
network of specialized tissue that controls actions and reactions of the body and its adjustment to the environment. Virtually all members of the animal kingdom have at least a rudimentary nervous system.
..... Click the link for more information. ; synapsesynapse
, junction between various signal-transmitter cells, either between two neurons or between a neuron and a muscle or gland. A nerve impulse reaches the synapse through the axon, or transmitting end, of a nerve cell, or neuron.
..... Click the link for more information. .Axon a neurite, or axis cylinder; the process of a nerve cell along which neural impulses proceed from the cell body to innervated organs and other nerve cells. Only one axon branches off each neuron, or nerve cell. The nutrition and growth of the axon depends on the neuron body; upon transection of the axon, its peripheral portion dies, but the central portion preserves its viability. Large animals possess axons—for example, those proceeding from the spinal cord to the extremities—that may reach a length of one meter or more when their diameter is several millimicrons (mμ). In some animals—for example, squid and fish—huge axons are found which measure hundreds of mμ in thickness. In axoplasm—that is, the protoplasm of axons—there are extremely thin fibrils, known as neurofibrils, as well as mitochondria and the endoplasmic network. Depending on whether axons are covered with a myelic (fatty) membrane or not, they are known as medullated or nonmedullated nerve fibers. The structure of the membranes and the diameters of the axons that constitute the nerve fiber are the factors that determine the rate of stimulus transmission along the nerve. The terminal sections of the axon, or terminals, branch off and make contact with other nerve, muscle, and gland cells. Stimuli are transmitted through these contact points, which are known as synapses. A nerve is a collection of axons. axon[′ak‚sän] (neuroscience) The process or nerve fiber of a neuron that carries the unidirectional nerve impulse away from the cell body. Also known as neuraxon; neurite. axon
axon [ak´son] the process of a nerve cell along which impulses travel away from the cell body. It branches at its termination, forming synapses at other nerve cells or effector organs. Many axons are covered by a myelin sheath formed from the cell membrane of a glial cell. adj., adj ax´onal.ax·on (ak'son), 1. The single process of a nerve cell that under normal conditions conducts nervous impulses away from the cell body and its remaining processes (dendrites). It is a relatively even filamentous process varying in thickness from about 0.25 to more than 10 mcm. In contrast to dendrites, which rarely exceed 1.5 mm in length, axons can extend great distances from the parent cell body (some axons of the pyramidal tract are 40-50 cm long). Axons that are 0.5 mcm thick or more are generally enveloped by a segmented myelin sheath provided by oligodendroglia cells (in the brain and spinal cord) or Schwann cells (in peripheral nerves). Like dendrites and nerve cell bodies, axons contain many neurofibrils. With some exceptions, nerve cells synaptically transmit impulses to other nerve cells or to effector cells (muscle cells or gland cells) exclusively by way of the synaptic terminals of their axons. 2. In neurology and other clinical work, the term axon is also used as meaning dendrites (q.v.), which term is seldom used clinically. [G. axōn, axis] axon (ăk′sŏn′) also axone (-sōn′)n. The usually long process of a nerve fiber that generally conducts impulses away from the body of the nerve cell.
ax′on·al (ăk′sə-nəl, ăk-sŏn′əl) adj.axon A thin elongated process of a neurone which transmits impulses from the neurone cell body to the axon terminus, which trigger the release of neurotransmitters.ax·on (ak'son) The single process of a nerve cell that under normal conditions conducts nervous impulses away from the cell body and its remaining processes (dendrites). Axons 0.5 mcm thick or thicker are generally enveloped by a segmented myelin sheath provided by oligodendroglia cells (in brain and spinal cord) or Schwann cells (in peripheral nerves). Nerve cells synaptically transmit impulses to other nerve cells or to effector cells (muscle cells, gland cells) exclusively by way of the synaptic terminals of their axons. [G. axōn, axis]axon The long fibre-like process of a nerve cell which, bundled together with many thousands of other axons, forms the anatomical structure known as a nerve. The axon conducts nerve impulses away from the nerve body.axon the process of a NERVE cell which conducts impulses from the nerve cell body.AxonA process of a neuron that conducts impulses away from the cell body. Axons are usually long and straight.Mentioned in: Charcot Marie Tooth Disease, Peripheral Neuropathy, Phenylketonuria, Sensory Integration Disorderaxon The threadlike process of a neuron which conducts nerve impulses from the cell body to the neuron's ending (bouton) where it is transmitted via a synapse to another neuron, muscle or gland. Syn. nerve fibre (when it is sheathed). See neuron; synapse.ax·on (ak'son) 1. The single process of a nerve cell that under normal conditions conducts nervous impulses away from the cell body and its remaining processes (dendrites).[G. axōn, axis]AXON
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| AXON➣Autonomous eXtended On-Officer Network (computer worn by officer) |
axon
Related to axon: DendritesSynonyms for axonnoun long nerve fiber that conducts away from the cell body of the neuronSynonymsRelated Words- nerve fiber
- nerve fibre
- nerve cell
- neuron
- nerve end
- nerve ending
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