Teens who participate in programs that involve role-playing about sexual situations are more likely to abstain from intercourse or use contraceptives when they do have intercourse

The psychosis-like effects of PCP and ketamine gives support to the

a) dopamine hypothesis b) brain-damage hypothesis c) NMDA and glutamate hypothesis d) environmental hypothesis

An opioid drug that is an agonist for delta receptors but antagonist for ORL-1 receptors would be considered a:

a. mixed opioid receptor agonist-antagonist. b. partial opioid receptor agonist. c. pure opioid receptor antagonist. d. pure opioid receptor agonist.