Abuur nooc ka mid ah weedhan oo ka adag kuwa kale ee neurotransmitters oo kaliya u gudbiya macluumaadka neuron presynaptic ilaa postsynaptic, unugyada yaryar, aan la soo saarin, iyo dufanka dufanka leh ee dufanka leh ee dufanka leh ayaa si ballaaran u faafin kara oo si fudud u geli kara unugyada.
Dabcan, nooc ka sii adag jumlada ayaa ah "Si ka duwan inta badan neurotransmitters-ka kale ee kaliya gudbiya macluumaadka ka soo horjeeda neuron presynaptic ilaa postynaptic neuron, molecule-ka yar ee nitric oxide wuxuu ku faafin karaa meel kasta oo sidaas darteedna wuxuu ku dhaqmi karaa dhowr neuron oo u dhow, xitaa kuwa aan ku xirneyn synapse. "