Morphine and other opiate drugs decrease sensitivity to pain by ...

[LaDunn]

Morphine and other opiate drugs decrease sensitivity to pain by ____.
 
  a. depleting substance P from parts of the nervous system
  b. mimicking the effects of endorphins at the synapses
 c. preventing sodium from crossing the membrane
 d. altering blood flow to various parts of the nervous system

Question 2

As the body comes to expect the drug under certain circumstances, it reacts strongly when the drug is absent, a reaction known as ____.
 
  a. tolerance
 b. craving
 c. withdrawal
  d. abstinence

[rnehls]

Answer to Question 1

b

Answer to Question 2

c

[LaDunn]

Thanks for the timely response, appreciate it

[blakcmamba]

Great answer, keep it coming