going before another in time or order I'd like to follow up on an antecedent question from another reporter Synonyms previous, anterior, foregoing, former, precedent, preceding, priorRelated Words advance, early, premature; earliest, first, inaugural, initial, maiden, original, pioneer; preexisting; introductory, preliminary; erstwhile, whilomNear ...
Neurotransmitters are formed in a presynaptic neuron and stored in small membrane-bound sacks, called vesicles, inside this neuron. When this neuron is activated, these intracellular vesicles fuse with the cell membrane and release their contents into the synapse, a process called exocytosis.
The neurotransmitter, acetylcholine, once it has diffused into the synapse, binds to the nicotinic acetylcholine receptors, which are found in the motor end plate. These receptors are ligand-gated ion channels, and once acetylcholine has binded to the receptors, it causes the channels to open.