Motivation: Eating Behavior

Question 1

The part of the brain that plays an important role in organizing motivational behavior?

Answer 1

The hypothalamus

Question 2

Stomach

Answer 2

Receptors are activated when the stomach is full. Contractions may be associated with hunger.

Question 3

Intestine

Answer 3

Monitors nutrient levels, particularly at the duodenum.

Question 4

Cholecystokinin (CCK)

Answer 4

A hormone that affects satiety. Decreases feeding rate/hunger. We are still unsure of how CCK works.

Question 5

Liver

Answer 5

May also inhibit food intake. If glucose is injected into the portal vein, hunger and eating is reduced. More glucose = less hunger.

Question 6

Brain

Answer 6

Monitors glucose levels in the brain. Low glucose = more hunger.

Question 7

Lateral Hypothalamus

Answer 7

Damage in this area caused animals to refuse to eat, or do much of anything. ‘Start eating center’.

Question 8

Ventromedial Hypothalamus

Answer 8

Damage in this area causes an animal to eat voraciously. Cells in the peripheral NS store more calories as fat, while starving other cells.

Question 9

Fat Cells

Answer 9

Produces hormone leptin that indicates how much fat is in the fat cells. (more fat, more leptin) High leptin levels = reduced hunger

Question 10

Environmental Cues

Answer 10

Sight and smell of foods and time of day motivates us to eat. Ties in with incentive theory.

Question 11

Factors that Influence Obesity

Answer 11

Overeating, genetics, early childhood weight, metabolic factors, repetitive dieting, chronic stress.

Question 12

Repetitive Dieting

Answer 12

Body spends less time on generating heat during the excess energy times and spends even more time storing fat.

Question 13

Anorexia Nervosa

Answer 13

Extremely restrictive diet

Question 14

Bulimia Nervosa

Answer 14

Eat and purge