Which substance below enhances dopamine release in the nucleus ...

[karateprodigy]

Which substance below enhances dopamine release in the nucleus accumbens?
 
  A) caffeine
  B)sugar
  C) cocaine
  D) saccharin
  E) Clozapine

Question 2

Which of the following is a principle derived from the observation that heroin is more addictive than morphine?
 
  A) Food is a poor reinforcer for hungry rats.
  B) Immediate reinforcement is more important than quantity of reinforcer.
  C) Quantity of reinforcement is more important than immediacy of reinforcement.
  D) Longer delays between response and food delivery results in faster learning.
  E) Drugs that are rapidly cleared from the brain are more addictive.

[onowka]

Answer to Question 1

Answer: C

Answer to Question 2

Answer: B
Rationale: The fact that heroin is more addictive than is morphine illustrates the principle that immediacy of reinforcement (heroin crosses into brain more rapidly) is more important than quantity of reinforcer.

[karateprodigy]

Thanks for the timely response, appreciate it

[Alyson.hiatt@yahoo.com]

Wow, this really help