锌离子随着神经元的活动从突触前膜的囊泡中释放到突触间隙，对突触内受体进行调控。

This divalent cation is released from presynaptic vesicles into the synaptic cleft upon neuronal activity and acts as a modulator of many ligand-gated ion channels.

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最终，这些囊泡从圆球状变为长丝状，囊泡膜的转变十分迅速，等不及吸收液体保持圆鼓。

They eventually transformed themselves from round balls into long filaments. Their membranes had grown so fast that they couldn’t absorb fluid quickly enough to stay plumped up.

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囊泡的荧光标记和动态显微成像观察是研究蛋白质和膜转运机制的重要手段。

Fluorescent labeling and dynamic imaging of secretory vesicles are new powerful means to study the mechanisms of protein and membrane trafficking.

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