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Introduction to Hunger
What factors motivate eating? What causes us to feel hungry? Physical reasons
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Introduction to Hunger
What factors motivate eating? What causes us to feel hungry? Psychological reasons
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Introduction to Hunger
What factors motivate eating? What causes us to feel hungry? Social reasons
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Introduction to Hunger
What factors motivate eating? What causes us to feel hungry? Cultural & situational reasons
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The Physiology of Hunger
Empty stomach/stomach pangs Washburn study Stomach pangs contribute to hunger but don’t tell the whole story
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Body Chemistry & the Brain
L = Let’s Eat!! Blood glucose level Hypothalamus Lateral hypothalamus Ghrelin – hunger triggering hormone Vetromedial hypothalamus V = Volume met
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The Physiology of Hunger
There is an interaction between hormones and one’s metabolism.
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The Physiology of Hunger
There is an interaction between hormones and one’s metabolism. Metabolism: rate of energy expenditure Basal Metabolic Rate: the body’s resting rate of energy expenditure.
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The Physiology of Hunger
Set point The point at which an individual’s “weight thermostat” is supposedly set. When the body falls below this weight, an increase in hunger and a lowered metabolic rate may act to restore the lost weight.
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The Psychology of Hunger
What cultural and situational factors influence hunger?
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The Psychology of Hunger
Feeling stressed out? Carbohydrates boost serotonin levels, which has a calming effect.
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The Psychology of Hunger
Taste preferences Sweet and salty are genetic, but conditioning can alter preference. Delicacies in one culture can be repulsive in others. You have heard of “acquired taste”
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The Psychology of Hunger
Taste preferences Neophobia: dislike of things unfamiliar Adaptive taste preferences Hot climates where foods spoil include spices that inhibit bacteria growth Milk producing areas have people with higher lactose tolerance
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The Psychology of Hunger
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The Psychology of Hunger
Situational eating: Do you eat more when eating with others?
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The Psychology of Hunger
Situational eating: Do you buy more when you shop while you are hungry?
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The Psychology of Hunger
Situational eating: Unit bias
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The Psychology of Hunger
Unit bias
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The Psychology of Hunger
Unit bias
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The Psychology of Hunger
Unit bias
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The Psychology of Hunger
Unit bias
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The Psychology of Hunger
Situational eating: Food variety
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Obesity and Weight Control
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Obesity and Weight Control
Obesity can be toxic, affecting how you feel and how you are treated.
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Obesity and Weight Control
The Physiology of Obesity Bodies store fat for good reason Increased risk of diabetes, high blood pressure, heart disease, gall stones, arthritis, certain types of cancer.
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Obesity and Weight Control
Set point and metabolism Once you become fat, it takes less food to maintain weight than to get there. Fat has a lower metabolic rate than muscle Lean people seem naturally predisposed to move around more.
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Obesity and Weight Control
The genetic factor The food and activity factors Sleep loss Social influence Changing cultural norms
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Obesity and Weight Control
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Obesity and Weight Control
The genetic factor The food and activity factors Sleep loss Social influence Changing cultural norms Changing food consumption and lower activity levels are cause of increased obesity.
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Assignment Create a graph that shows your present approximate weight and what your weight will be per year if you gain ½ a pound a year AND 1 pound a year up to your 10th & 20th high school reunion.
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