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.
When an action potential causes the release of many acetylcholine vesicles, acetylcholine diffuses across the neuromuscular junction and binds to ligand gated nicotinic receptors (non-selective cation channels) on the muscle fiber.