Biological MotivationChapter 6Key Terms: Motivation, Homeostasis, Drive Reduction Theory, Hypothalamus

Motivation Define the following:

Motivation Biological

What might biological motivation mean? Examples?

Homeostasis Tendency of all

organisms to correct imbalances and deviation from their normal state

Example: Fever/sweating

Hunger Lateral

Hypothalamus: makes us eat More active when

cold Ventromedial

Hypothalamus: makes us stop eating More active when

hot

Glucostatic Theory Hypothalamus

monitors blood glucose

BG drops, LH stimulated

Insulin released After meal: liver

secretes glucagon

Set-Point Theory Set-Point: weight

around which day-to-day weight fluctuates

If VMH is destroyed, you will not eat until you explode

Obesity Dr. Stanley

Schachter Obese people

respond to external cues for eating Cracker & Almond

experiments

Drive Reduction Theory Clark Hull (1943) All motivation

comes from physiological needs

Deprivation of Need

Random activity

Drive reduced

Pulling it Apart Not all drives have

physiological origins

Harry Harlow monkey study

Pleasure centers in the brain are drives for stimulation