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.
1 Reuptake â re-absorption of a neurotransmitter into the neuron. 2  Transporters, or membrane transport proteins, pump neurotransmitters from the synaptic cleft back into axon terminals (the presynaptic neuron) where they are stored.ere are a few examples of important neurotransmitter actions: 1  Glutamate is used at the great majority of fast excitatory synapses in the brain and spinal cord. 2  It is also used at most synapses that are modifiable, i.e. capable of increasing or decreasing in strength.