Answer to Question 1
anorexia nervosa
Rationale: Anorexia nervosa is characterized by a morbid fear of obesity. Symptoms include gross distortion of body image, preoccupation with food, and refusal to eat.
Answer to Question 2
1, 3, 4
Rationale: Lesions in the appetite and satiety centers in the hypothalamus may contribute to overeating and lead to obesity. Hypothyroidism, not hyperthyroidism, is a problem that interferes with basal metabolism and may lead to weight gain. Weight gain can also occur in response to the decreased insulin production of diabetes mellitus and the increased cortisone production of Cushing's disease. New evidence also exists to indicate that low levels of the neurotransmitter serotonin may play a role in compulsive eating.