| 释义 |
▪ I. synapse, n. Anat.|sɪˈnæps, ˈsaɪ-|
[ad. Gr. σύναψις: see synapsis.]
The junction, or structure at the junction, between two neurons or nerve-cells.
1899Allbutt's Syst. Med. VI. 512 A feature of the concatenations of neurons more probably explicative of modification and delay of nerve impulses is the synapse. 1905McDougall Physiol. Psychol. ii. 27 A simple kind of synapse is formed by the division of the end of an axon..into a number of fine twigs that surround the cell-body of another neurone.
▪ II. synapse, v. Anat.|sɪˈnæps, ˈsaɪ-|
[f. the n.]
intr. Of a nerve-cell or axon: to form a synapse.
1910Practitioner July 98 The rubro-spinal portion (Monakow's bundle) connects the red nucleus with the opposite side of the spinal cord, probably terminating by synapsing round the anterior horn cells. 1963R. P. Dales Annelids vi. 119 The axon is T-shaped, the cell body lying ventrally or ventro-laterally at the bottom of the T and the tips of the arms synapsing with those of the next neuron. 1979Sci. Amer. Sept. 84/1 Many such cells do not themselves make contact with a motor neuron; they synapse instead on yet other neurons of the great intermediate net.
Also syˈnapsed ppl. a. Genetics [cf. synapsis 2], (of chromosomes) in a state of synapsis.
1931Amer. Jrnl. Bot. XVIII. 370 The synapsed spireme strands traverse the nucleus freely. 1946Nature 21 Dec. 912/1 Perhaps such chemical agents in the egg help in separating the synapsed X-chromosomes. 1974Ibid. 12 Apr. 566/2 The X element contains three synapsed chromosomes. |