Mice without the gene that produces this hormone (question 28) or its receptors were unable to control their food intake or to maintain a normal body weight.

What is the typical outcome among nonhuman primates who are raised in isolation without a parent or substitute attachment figure?

a. Their social development is normal. b. They show problems until adolescence. c. They show no problems until adolescence. d. They have dramatically troubled social relationships.

Lois avoids crowded streets and stores, and rarely ventures to the theater or to church. She is particularly fearful of traveling through a tunnel or bridge, and has never ventured onto a bus. Lois most likely suffers from _______.

A. panic disorder B. social phobia C. agoraphobia D. PTSD