Choose a opiate and tell:
a. The drug's effect on synaptic neurotransmission,
(Look at the " Interactive: 3Drug Effects on Synaptic Neurotransmission exercise" (above) -- which of those 11 effects is happening with the drug you are discussing?)
b. The drug's effect on the mesolimbic dopamine pathway (ventral tegmental area to nucleus accumbens to prefrontal cortex),
(Is this a direct or indirect effect -- if indirect, how exactly?)
c. At least 2 behaviors of someone using or abusing the drug, and
d. At least 2 behaviors of someone withdrawing from the drug.
(think about brain regions, where else (besides mesolimbic reward pathway) are you seeing effects?)