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.
(B) Ca2+ channels open in response, and Ca2+ ions diffuse into the end bulb. The influx of Ca2+ causes many of the synaptic vesicles to fuse with the neuron membrane. Thousands of acetylcholine (ACh) molecules are released into the synaptic cleft. A few diffuse across the synaptic cleft and bind to the acetylcholine receptors that are embedded in the membrane of the postsynaptic neuron. (C) When both ACh binding sites are occupied, the acetylcholine receptors open.