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.
At the synapse, or the motor end plate, acetylcholine opens sodium channels causing sodium influx into the muscle fiber causing depolarization. This depoâ¦larization causes calcium released from the sarcoplasmic reticulum that initiates muscle contraction by activating sarcomeres.