The bony cavities of the skull that contain the eyes are the

For the past two weeks, Cameron has been taking a mild sedative to help him fall asleep. He is likely to find that

a. he now needs to take a larger dose in order to fall asleep because sedatives become less effective over time. b. he can take less of the drug because the effects of sedatives tend to be cumulative. c. he will spend more of the night dreaming than he did without the sedative. d. after two weeks, his insomnia should be cured, and he can stop using the sedative.

The American Academy of Pediatrics recommends that adolescents get 60 minutes of exercise per

a. day. b. three-day period. c. week. d. month.