Which of the following occurs during REM sleep?

Designer drugs such as Ecstasy, “Molly,” and “bath salts”:

A) impact the ability to focus. B) can cause delirium. C) indicate the complex interaction between physical and psychological health. D) all of the answers are correct.

What is the recidivism rate (frequency of those who eventually resume the habit) for smokers who quit?

a. almost all quitters resume the habit b. few ex-smokers smoke again c. about 50 percent return to smoking d. it varies by age, length of the habit, etc.