which is not the neurotransmitter criteria? a) neurotransmitter has to be consumed in the diet. b) chemical must be rapidly inactivated/broken down after its release. c) application of the isolated neurotransmitter on the post-synaptic cell membrane should have the same effect when it is released by a neuron. d) postsynaptic potential change must result when a neurotransmitter is released and bound to its postsynaptic receptors. e) none of the above.