If you are doing a quick study check, you may be able to answer many of these questions using just a few words. To sharpen your writing skills, write a longer essay expanding on the points in your short answer.

1			Freud labeled the three levels of the mind's consciousness as conscious, preconscious, and unconscious. How did Freud describe these three levels?
2			Define circadian rhythms. How are they controlled by the brain?
3			Utilizing the terms and concepts in this chapter, how would you describe your own sleep?
4			Depressants, amphetamines, opiates, and hallucinogens are among the major classes of drugs. Choose one of these classes and list some drugs in it, then describe their benefits and drawbacks.
5			Why are some individuals seemingly very receptive to hypnosis while others are not?