Which of the following is true of opioid systems and effects? ...

[skymedlock]

Which of the following is true of opioid systems and effects?
 
  A) Opioids reduce appetite.
  B) Opioids are commonly used to induce diarrhea. .
  C) Heroin is an opioid receptor antagonist.
  D) Naloxone is an opioid receptor antagonist.
  E) Opioid drugs enhance the aversiveness of pain.

Question 2

A key difference between neuropeptides and monoamine neurotransmitters is that neuropeptides
 
  A) are not terminated by reuptake into axon terminals.
  B) are not packaged within vesicles.
  C) do not act via receptors.
  D) are not synthesized in the neuron soma.
  E) are secreted only from the active zone of an axon terminal.

[kaylee05]

Answer to Question 1

Answer: D

Answer to Question 2

Answer: A
Rationale: A key difference between neuropeptides and monoamine neurotransmitters is that neuropeptides are not terminated by reuptake into axon terminals.

[skymedlock]

Thank you!

[kaylee05]

Happy to help