| 词汇 | dendrite |
| 释义 | dendrite noun[ C ] uk /ˈden.draɪt/ us /ˈden.draɪt/ one of the short parts like threads at the edge of a nerve cell that carry messages to the cell（神经细胞）树突 Cells actin anaphase anti-platelet assort axoplasm histography homologous chromosomes infiltration intercellular intermitotic nerve fibre neurofibril neurofibrillary neuroglia neuroglial tetrad thrombocyte thymocyte turgor unciliated It is now known that the protoplasm in all parts of the neuron proper—cell-body, axis cylinder, and dendrites—has a grayish color, while the coverings of most of the fibers are white. One inclines to imagine a retraction of dendrites, which breaks the connection between the central end of the optic nerve and the occipital centers of vision. The dendrites are short extensions from the cell-body. The white matter contains no nerve cells or dendrites. These axon runners from one cell connect through synapses to dendrite runners on other cells. dendrite | American Dictionarydendrite noun[ C ] us/ˈden·drɑɪt/ biology the short parts like threads at the edge of a nerve cell that carry messages to the cell Examples of dendritedendrite The neurons had conical somas with well-defined networks of neurites and dendrites extending from the cell body. Most of labeling observed in retinorecipient layers correspond to dendrites of tecto-thalamic cells. Second, and more prominent, we observed that neighboring dendrites were pulled apar t from each other. Individual dendrites or dendritic domains located on the same cell could independently modulate several different retinal circuits. The principal input to these circuits are thalamic afferents that synapse on excitatory cells with spiny dendrites. Thus, we focused on tracing labeled dendrites through serial sections using electron microscopy to determine their precise ultrastructural localization beneath the cone pedicle. However, their dendrites are profusely branching with many thorn-like varicosities densely filling the area of arborization. The ganglion cell's dendrites densely branch over the region of arborization, and many dendritic spines are present. The number of relatively stout, primary dendrites was fewer, although a great many fine branches radiated sinuously from the soma. These are found on both the dendrites and axon terminals. The densities in the dendrites ranged from 0.25 to 4 times that found in the soma. There are many regular curves which are not local dendrites. When the dendrites were not regularly spiking, the receptive field radius was only 250 mm. In the reptilian cortex, most ingrowing fibers run above the cortical plate in the zone where the receptive tufts of the apical dendrite branch extensively. The cell had a very densely branched dendritic tree with somewhat thin, very spiny dendrites. 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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