Which of the body's hormones is primarily responsible for inducing sleep?

Axis II of the DSM-IV-TR is devoted exclusively to __________ disorders

a. sexual b. sleep c. personality d. anxiety e. somatoform

Conservation refers to the

A) failure to distinguish others' symbolic viewpoints from one's own. B) belief that inanimate objects have lifelike qualities, such as thoughts, wishes, feelings, and intentions. C) inability to mentally go through a series of steps in a problem and then reverse direction, returning to the starting point. D) idea that certain physical characteristics of objects remain the same, even when their outward appearance changes.