As you may have guessed, there are no right or wrong answers to the essay questions in this practice test. That does not mean, however, that all essays are equally good. To get maximum learning benefit from the essay questions, do the following:

• Review each essay a day or two after you wrote it, noting any necessary corrections and any additional support for your points that you can think of.
• Review the section in your textbook that pertains to the topic of each essay. Annotate your essay with any corrections or additional support for your points that you find in the text.
• Spend a few minutes researching the topic of each essay on the Internet. Annotate your essay further with any additional (reliable) information you find.
• Finally, reread each essay with the annotations you have added.

1		Based on what you learned about circadian rhythms in this chapter, what measures do you think workers and employers should take to reduce the effects of circadian rhythm disruption caused by work schedules?
2		How can a person tell if he or she is developing a substance dependence? What is the relationship between substance dependence on the one hand, and drug tolerance and withdrawal on the other?
3		Do you support the legalization of marijuana for medical use? If so, under what circumstances and conditions? Defend your position for or against legalization, citing information in this chapter.