A study in rats finding that greater concentrations of sucrose, an enjoyable taste for rats, led to greater concentrations of dopamine in the nucleus accumbens suggests that:
a. sucrose serves as an agonist for dopamine neurons.
b. dopamine levels increase as the value of reward increases.
c. an increased firing rate of GABA neurons occurred in the ventral tegmental area.
d. sucrose was likely a novel stimulus.
Ans: B
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What will be an ideal response?
Selma notices that as her supply of marijuana decreases she starts thinking more and more about where she can get another supply as well as feeling nervous and anxious. This is an example of
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