Neurons communicate with each other via specialized inter-cellular junctions called synapses shown in the cover illustration. Excitatory synapses are characterized by an enrichment of presynaptic vesicles at the axon ...Neurons communicate with each other via specialized inter-cellular junctions called synapses shown in the cover illustration. Excitatory synapses are characterized by an enrichment of presynaptic vesicles at the axon terminal and postsynaptic electron-dense membrane thickenings （referred to as postsynaptic density, PSD） at the top of dendritic spines. Upon stimulation, neurotransmitters are released from the presynaptic terminal and act on the specific receptors on the postsynaptic side to initiate signaling processes.展开更多
文摘本文采用聚丙烯酰胺凝胶垂直平板电泳的方法,对产于福建武夷山和浙江九龙山的崇安髭蟾(Vibrissaphora Liui Pope)作了四种器官组织(肝、心、脑、肾)乳酸脱氢酶(LDH)和酯酶(EST)同工酶的分析比较,结果表明,两个产地髭蟾的同工酶谱无差别,我们认为,武夷山和九龙山崇安髭蟾的形态差异只能是地理种群分化(geographical population differentiation),把这两个不同产地的髭蟾作为同一个种处理是恰当的。
文摘Neurons communicate with each other via specialized inter-cellular junctions called synapses shown in the cover illustration. Excitatory synapses are characterized by an enrichment of presynaptic vesicles at the axon terminal and postsynaptic electron-dense membrane thickenings （referred to as postsynaptic density, PSD） at the top of dendritic spines. Upon stimulation, neurotransmitters are released from the presynaptic terminal and act on the specific receptors on the postsynaptic side to initiate signaling processes.
