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.
â¢ Presence of calcium ions in the axon terminal cause synaptic vesicles to fuse with the membrane. Release of Acetylcholine. â¢ Acetylcholine is released into the synaptic cleft & calcium ions are pumped out of the axon terminal. Calcium ions trigger a contraction of the muscle cell. Summary. â¢ Each skeletal muscle cell is individually stimulated by a motor neuron. â¢ The neuromuscular junction is the place where the terminal portion of a motor neuron axon meets a muscle cell membrane, separated by a synaptic cleft.