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.
Oprostite što ovdje koristim filozofsku terminologiju, no kada je izlučen iz krajnjih dijelova aksona motornih neurona, puno se divnih stvari dogodi u ionskim kanalima i prokleta ruka ode gore.