Sorry to use philosophical terminology here, but when it's secreted at the axon end-plates of the motor neurons, a whole lot of wonderful things happen in the ion channels and the damned arm goes up.
抱歉这儿用了一些难懂的术语 但当运动神经元轴突终板分泌的时候 离子通道内会发生许多奇妙的事 然后手臂这玩意儿就抬起来了