A neurotransmitter must be present within the presynaptic neuron. 突触前神经元必须存在神经递质。
They do so by traveling from the so-called presynaptic neuron across a tiny gap to bind to receptors on the postsynaptic neuron's cell membrane. 它们从所谓的突触前神经元出发，通过神经元之间的微小间隔，而与突触后神经元细胞膜上的受体相接。
