ESIM - Evaporative System Integrity Monitor, All Acronyms, viewed April 16, 2017, <https://www.allacronyms.com/ESIM/Evaporative_System_Integrity_Monitor>.
Acetylcholine is the neurotransmitter used at the neuromuscular junction âin other words, it is the chemical that motor neurons of the nervous system release in order to activate muscles.
Merge this question into. Split and merge into it. Answer by Amaroque. Confidence votes 11.3K. Acetylcholine (ACh) is the neurotransmitter that passes from neuron to muscle cells and it causes the Na/K channels to open allowing Na+ to flow into the cell triggering an action potential.nswer this questWhen the motor neuron releases acetylcholine into  the neuromuscular junction, the acetylcholine binds to receptors in  the muscle fiber that allows positiv â¦ ely charged ions to enter the  muscle fiber, which results in the muscle fiber contracting. 3 people found this useful.