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.
Photo Credit XiXinXing/XiXinXing/Getty Images. Acetylcholine is a chemical messenger, a neurotransmitter, released by nerve cells in many parts of the peripheral nervous system. It controls the contraction of all skeletal or voluntary muscles, for instance. It also affects the contraction of smooth and cardiac muscle.he effect of acetylcholine on cardiac muscle, however, is very different from its effects on skeletal or smooth muscle. In the heart, acetylcholine activation of muscarinic receptors causes channels in the muscle membrane to let potassium pass.