The withdrawal syndrome from opiates appears to be mediated by ...

[bclement10]

The withdrawal syndrome from opiates appears to be mediated by
 
  a. Activation of the parasympathetic nervous system and activation of the
  hypothalamic-pituitary-adrenal axis.
  b. Suppression of the parasympathetic nervous system and activation of
  the hypothalamic-pituitary-thyroid axis.
  c. Activation of the sympathetic nervous system and the hypothalamicpituita ry-
  adrenal axis.
  d. Suppression of the sympathetic nervous system and activation of the
  hypothalamic-pituitary-thyroid axis.

Question 2

Because it is highly lipophillic, intravenously administered heroin can penetrate the brain within
 
  a. One to two seconds.
  b. 15 to 20 seconds.
  c. 60 to 90 seconds.
  d. Five to 10 minutes.

[nmyers]

Answer to Question 1

c

Answer to Question 2

b

[bclement10]

Excellent

[dreamfighter72]

YES! Correct, THANKS for helping me on my review