| 词汇 | synapsis |
| 释义 | synapsis noun[ U ] uk /sɪˈnæp.sɪs/ us /sɪˈnæp.sɪs/ the joining of chromosomes from each parent during the first stage of cell division（染色体的）联会，接合，对合 Genetics accession number adenine anaphase autosomal autosomally genetic fingerprinting genetically genetically engineered geneticist genic genomic genomics monozygotic mutate non-Darwinian non-familial non-genetic non-mutant nondominant sex-linked synapsis | American Dictionarysynapsis noun[ U ] us/sɪˈnæp·sɪs/ biology the joining of chromosomes from each parent during the first stage of cell division Examples of synapsissynapsis In contrast, peripheral afferents constitute only 15% of total synapses. The peri synaptic membranes were more deeply polarized when driven by clustered synapses, and least when driven by the unconfined distribution (second and third rows). The most parsimonious explanation would be that no functional synapses were formed in the outer plexiform layer to allow for synaptic transmission in these mice. This leaves the possibility of electrical synapses or a second type of transmitter. Inhibitory synapses formed by inhibitory cells are shown by filled circles. Output synapses include 25 dyads and 6 monads, ribbon synapses with a single postsynaptic element. Thus, adverse postnatal experience could contribute significantly to disordered development; enriching experiences, on the other hand, could potentially facilitate survival of neurons and synapses. In accord, voltage attenuations were severe for synapses located anywhere within 80% of the arbor (>75% loss at the soma). The fact that the various synaptotagmins are co-expressed in synapses but not co-localized on synaptic vesicles suggests that they may have distinct functions. This might explain why glutamate released from astrocytes produces such diverse effects on different synapses and cell types. If synapses are stabilized by the light exposure, then the second deprivation should have no effect. Note that the relative density of immunoreactive processes or terminals may not be directly related to the density of synapses. Synaptic ribbons or bars are electron dense structures on the presynaptic side of photoreceptor and bipolar cell synapses. A set of plastic synapses on a command neuron constitutes a link vector. As for neuronal loss, however, stereological investigations have not supported early reports that there is widespread and dramatic loss of synapses in the aging brain. 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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