神经突触横截面图

一张高端神经科学教科书风格的化学突触横截面图。上半部为突触前末梢，布满淡紫色囊泡（内含神经递质小点）与暖橙色线粒体；突触间隙为极淡黄色细缝，神经递质分子飞渡其中；下半部突触后膜嵌有青绿色 Y 形受体通道，部分开放部分关闭，标注微小离子流箭头。小圆形插图放大一个囊泡融合事件。深紫背景，细领线标注，9pt Helvetica 字体，严格科学精确风格。

A precise anatomical cross-section illustration of a chemical synapse between two neurons, rendered in the style of a high-end neuroscience textbook. Viewpoint: close-up transverse cut, portrait orientation. The presynaptic terminal bouton on the upper half is filled with dozens of small translucent vesicles in pale lavender, each containing neurotransmitter dots. Mitochondria shown as elongated bean shapes in warm orange. The synaptic cleft is a narrow 20-nanometre gap shaded in very pale yellow, with small spheres mid-flight representing neurotransmitter molecules. The postsynaptic membrane on the lower half has embedded receptor proteins shown as Y-shaped channels in teal, some open, some closed. Ion channel flux indicated by tiny arrows. A close-up inset circle zooms into one vesicle-membrane fusion event. Color palette: deep plum background for cytoplasm, lavender vesicles, orange mitochondria, teal receptors, pale yellow cleft. Labels use thin leader lines and 9 pt Helvetica-style font. No decorative flourishes — strict scientific accuracy.