1·These results suggest that L-thyroxine sodium could increase neuromuscular transmission, and the effect seems to be presynaptic in nature.
结果提示，L-甲状腺素钠能增强神经-肌肉传递，其起源可能是突触前的。
2·The characteristic microscopic findings of Alzheimer's disease include "senile plaques" which are collections of degenerative presynaptic endings along with astrocytes and microglia.
Alzheimer病典型的显微镜表现包括“老年斑”与星形胶质细胞和小胶质细胞，老年斑是变性的突触前末梢。
3·A neurotransmitter must be present within the presynaptic neuron.
突触前神经元必须存在神经递质。