Exam 13: Opioids

The majority of U.S.soldiers who used heroin in Vietnam did so through the intravenous route because the drug was relatively impure.

Enkephalins,endorphins,and dynorphins are

Papaver somniferum is the scientific name for

-Describe how both positive reinforcement and negative reinforcement contribute to the development of dependence on opioid drugs.

Heroin is more potent than morphine because

Vicodin and OxyContin are examples of

Naloxone,nalorphine,and naltrexone are examples of

Possession of opium,morphine,or heroin without a prescription was made a crime by

The two major active chemicals in opium are

Naloxone and nalorphine are endogenous chemicals that have effects similar to morphine.

Heroin became the drug of choice for many opioid users

Heroin was originally a brand name for diacetylmorphine,manufactured by Bayer laboratories.

The fact that animals with no history of opioid withdrawal will press a lever to self-administer low doses of intravenous morphine or heroin demonstrates the importance of ____________ in developing opioid dependence.

At the current time,most of the heroin in the U.S.originates from poppy fields in

In a heroin user,negative reinforcement of drug-taking behavior can occur when

In 1898,Bayer laboratories marketed diacetylmorphine tablets under the brand name