| 词汇 | axon |
| 释义 | axon noun[ C ] anatomy specializeduk /ˈæk.sɒn/ us /ˈæk.sɑːn/ a long, thread-like structure attached to a nerve cell that sends out signals away from the nerve cell（神经）轴突 libre de droit/iStock/Getty Images Plus/GettyImages Substances & structures in the body abductor accessorius ACL actin adductor funiculus fusiform glomerular glomerulus GnRH navicular neuroendocrine neurohormonal neurohormone nociceptive tendinous tendinum tendo tensor Th axon | American Dictionaryaxon noun[ C ] us/ˈæk·sɑn/ biology a long thread that comes out of a nerve cell and carries signals from it Examples of axonaxon As the stimulus became larger, more long-range axons were recruited into the collective oscillation, thereby increasing the gain of the feedback circuit. From the peripheral retina, where there is little fasciculation, axons converge on the optic disc. Although far less frequent, some axons were seen to be ensheathed by an oligodendrocytic process; such axons were counted as 'myelinated'. Myelinated axons are organized into a series of polarized domains that are crucial for normal saltatory conduction. Regressive events such as cell death and the elimination of long axon collaterals and dendritic processes are essential mechanisms of brain maturation. Each pattern is broadcast through the brain by divergent-convergent axon projections. When conventional symmetrical biphasic pulses were used, there was little selectivity between activation of local cells and activation of axons of passage. As a result, the nodal length in larger axons (>1 mm) is significantly reduced in transgenic mice compared with their wild-type littermates. Serial electron microscopic reconstruction of axon terminals on physiologically identified thalamcortical neurons in the cat ventral lateral nucleus. During early regrowth only a few axons entered an otherwise complete connective-tissue bridge. However, regulation of their expression levels suggests a role for both proteins during axon growth in the visual pathway. These small concentrations and the diffuse labeling appeared in a linear orientation as though they were aligned along an axon. Even if some connections for intermediate (1-10 mm) distances are tangential, the final synaptically active parts of the axons are vertically oriented. Ionic conductance changes in lobster axon membranes when lanthanum is substituted for calcium. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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