Which of the following statements about human sleep cycles is true?
A. After each successive cycle, time spent in REM sleep decreases by half.
B. Typically, an individual experiences four to five sleep cycles each night.
C. The sleep cycle pattern is consistent for an individual across the lifespan.
D. The time spent in stages 3 and 4 of NREM sleep increases in the later sleep cycles.
B. Typically, an individual experiences four to five sleep cycles each night.
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Which of the following mood-altering substances accounts for nearly 100,000 deaths per year and is directly responsible for more than half of traffic accidents (one-third of all U.S. fatalities)?
a. Alcohol b. Marijuana c. Crack/cocaine d. Heroin
A pandemic affects ________.
A. none B. all C. some D. a select
Rich lives in close quarters with 30 fraternity brothers, so which supplement might be helpful for him to take to prevent getting sick from a cold or the flu?
A) flaxseed
B) Echinacea
C) ginkgo biloba
D) ginseng
Which of the following defines the term stress?
A. A form of systematic desensitization in which the stimulus is imagined B. The confidence in the ability to manage a demand or threat C. A method of coping with anxiety that involves examining irrational beliefs D. The result of a demand that exceeds resources available to meet that demand