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 first step in synaptic transmission is the synthesis and storage of neurotransmitters. There are two broad categories of neurotransmitters.Small-molecule neurotransmitters are synthesized locally within the axon terminal. Some of the precursors necessary for the synthesis of these molecules are taken up by selective transporters on the membrane of the terminal.here are two broad categories of neurotransmitters. Small-molecule neurotransmitters are synthesized locally within the axon terminal. Some of the precursors necessary for the synthesis of these molecules are taken up by selective transporters on the membrane of the terminal.