I looked in the web and readhttp://web.sfn.org/baw/pdf/brainfacts.pdf .But still didn't get it . So actually electrical signal triggers release of different neurotransmitters . Neurotransmitters actually serve like different signals . But is the amount of neurotransmitters realised in a single connection matter? Is it on/off thing (specifical neurotransmitter released/not released) ? How exactly electrical signal governs release of neurotransmitters ? Is there any difference in amplitude /shape of signal? How the right neurotransmiiter to be released is chosen (e.g. how it knows that it shoudl release dopamnine and not glutamate?) And how the all the weights (e.g. presence of neurotransmitters in all dendrites) in neuron are actually added and how the output electrical signal is generated? -E.g. how the actual proccessing of signals works? How a neuron ( a single cell) process all the amount of data from all the inputs and governs the distribution of electrical signals to its outputs?