You will find good information in these links

http://en.wikipedia.org/wiki/Anorexia_nervosa
http://en.wikipedia.org/wiki/Bulimia_nervosa
http://kidshealth.org/parent/nutrition_center/healthy_eating/habits.htm
http://kidshealth.org/parent/emotions/feelings/eating_disorders.html#cat20116
http://www.funtrivia.com/playquiz/quiz3063092311360.html