1、突触前成分(presynaptic element) 连接处增厚称突触前膜，内有突触小泡、 线粒体等，突触小泡含神经递质。 2、突触间隙(synaptic cleft) 是神经递质释放场所。
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和突触前成分内突触素 synaptophysin ; SYP
免疫电镜还显示有TH阳性神经元胞体和轴突末梢，后者可作为突触前成分与TH阴性结构形成突触。
Especially, there were TH-like positive cell bodies and axonal endings which formed synapses as presynaptic elements with th negative postsynaptic structures.
而突触的成熟与树突棘的分化是同步的，突触的特化可能依赖于树突棘的成熟和突触前囊泡成分的表达。
Synapse maturation was synchronous with dendritic spine differentiation, synaptic specialization may be dependent on dendritic spine maturation and the expression of presynaptic vesicle components.
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