[Verse 1] In the bouton, button-shaped and small, Vesicles like lanterns lining a corridor wall, Each one loaded with a chemical shout, Waiting for the voltage to let the message out. No wires touching, just a gap to cross, A sliver of space where the current gets lost. [Chorus] Pre, cleft, post — that's the synapse creed, Twenty nanometers is all the gap you need, That gap's called the interstice, a tiny empty seam, Where neurotransmitter crosses like a current in a stream. Pre to post, the spark relayed, That's the architecture every signal's made. [Verse 2] Active zone's the dock where the vesicles will fuse, Calcium rings the bell and nobody can refuse, They burst and spill their cargo into the open air, Drifting toward a wall of welcome waiting there. That wall's the postsynaptic density, thick as felt, PSD-95 the glue, the way the proteins melt Together into scaffolding, bolting receptors tight, Catching every whisper, left side to the right. [Chorus] Pre, cleft, post — that's the synapse creed, Twenty nanometers is all the gap you need, That gap's called the interstice, a tiny empty seam, Where neurotransmitter crosses like a current in a stream. Pre to post, the spark relayed, That's the architecture every signal's made. [Verse 3] Axo-dendritic is the usual affair, Axon finds a dendrite's branches everywhere, Axo-somatic lands right on the body's door, Axo-axonic — axon meets an axon, rare but sure. Three addresses, one chemical letter mailed, Location is the plot twist, never failed. [Bridge] But not every junction needs a chemical kiss — Gap junctions fuse two cells directly, just like this, Electrical synapses, instant, no delay, Ions hopping channels, vesicles out of play. And where you land still matters, don't forget the clause, Near the soma, a whisper carries weightier cause, Far out on a dendrite, the signal fades and thins, Adding up the inputs decides which voice wins. [Verse 4] Dopamine, serotonin, GABA in the mix, Glutamate shouts loud, glycine does its tricks, Acetylcholine bridges muscle and the mind, Each transmitter a key, each receptor redesigned. Reuptake pumps recycle what the cleft released, Enzymes chew the leftovers, bringing quiet peace, Balance is the rhythm, too much or too little strain, The dance of chemistry writing patterns in the brain, Every molecule a word in a silent, endless speech, Synapses the grammar that the neurons learn to teach. [Outro] Pre, cleft, post, the anatomy of thought, Twenty nanometers is as close as cells get caught, Vesicle and receptor, the interstice between, Everything a synapse is, and everything it's seen. Pre to post, the spark relayed — That's the architecture every signal's made. [Chorus] Pre, cleft, post — that's the synapse creed, Twenty nanometers is all the gap you need, That gap's called the interstice, a tiny empty seam, Where neurotransmitter crosses like a current in a stream. Pre to post, the spark relayed, That's the architecture every signal's made.
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