Little Nero is a lost neurotransmitter who just found himself atop a receptor of the receiving dendrite and nees to get his charge to the neighboring neuron,, need to give detailed instructions to Little Nero so he is able to reach a successful action potential??
Since the action potential in any neuron is fostered by the accumulation of multiple neurotransmitters, one little neurotransmitter molecule is unlikely to make a difference.
If he is already "atop a receptor of the receiving dendrite", he is where he needs to be. Are you looking for the electrochemical changes fostered?
Google under "synaptic transmission" for more information.