different types of synapses

acetylcholine adenosine adrenaline amino anandamide anatomy axoaxonic axodendritic axon axosomatic bind biology brain care catecholamine cell channel chemical cleft connexon depression diagram disease dopamine education electrical epinephrine gap glycine health healthcare healthy histamine hormone human illustration ions junction mechanisms medical medicine membrane mood narcotic nerve nervous neuro neurology neuron neurons neurotransmitter neurotransmitters norepinephrine opioid oxytocin peptide presynaptic receptor recycle releasing response scheme science serotonin signal smoking somatostatin structure substance synapse synaptic system target terminal triphosphate vector