Which of the following is true of opiate reinforcement?
a. Opiates cause release of dopamine within the hippocampus.
b. Injections of opiates into the spinal cord are reinforcing.
c. Injections of opiates into the VTA are reinforcing.
d. Natural rewards involve cholinergic and opiate systems.
e. Naloxone blocks cocaine reinforcement.
Answer: c. Injections of opiates into the VTA are reinforcing.
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a. 10 c. 100 b. 50 d. 1000