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Biological MotivationChapter 6Key Terms: Motivation, Homeostasis, Drive Reduction Theory, Hypothalamus
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Motivation Define the following:
Motivation Biological
What might biological motivation mean? Examples?
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Homeostasis Tendency of all
organisms to correct imbalances and deviation from their normal state
Example: Fever/sweating
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Hunger Lateral
Hypothalamus: makes us eat More active when
cold Ventromedial
Hypothalamus: makes us stop eating More active when
hot
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Glucostatic Theory Hypothalamus
monitors blood glucose
BG drops, LH stimulated
Insulin released After meal: liver
secretes glucagon
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Set-Point Theory Set-Point: weight
around which day-to-day weight fluctuates
If VMH is destroyed, you will not eat until you explode
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Obesity Dr. Stanley
Schachter Obese people
respond to external cues for eating Cracker & Almond
experiments
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Drive Reduction Theory Clark Hull (1943) All motivation
comes from physiological needs
Deprivation of Need
Random activity
Drive reduced
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Pulling it Apart Not all drives have
physiological origins
Harry Harlow monkey study
Pleasure centers in the brain are drives for stimulation