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| A need/ desire that energizes and directs behavior |
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| A physiological need creates an aroused stat that drives the organism to reduce the need by, say, eating or drinking |
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the process of feeding back to the input a part of a system's output
-advantages,such as increased stability of the system, it also has disadvantages,like loss of gain. |
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| -a kind of system which reacts to changes in its environment, usually to maintain some desired state of the system |
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| -the response of the system is to change that variable even more in the same direction. |
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| The maintenance of a steady internal state such as body temp and blood glucose. |
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| The base is physiological needs that must first be satisfied before higher-level safety need and then psychological needs become active. |
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| The point at which an individual's weight thermostat is supposedly set. When the body falls below this weight, an increase in hunger & a lowered metabolic rate may act to restore the lost weight. |
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-Produced the Drive theory
-if needs not met, drive energizes. |
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| -Founded the hierarchy of needs |
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| -Form of sugar that circulates in the blood and provides major source of energy for body tissues. Levels low= feel hungry. |
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-Drop in glucose levels signal hypothalamus-hunger increases
-High glucose levels-hunger shut off |
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| Diminish blood glucose, partly converting it to stored fat. |
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-Hunger center
-reduction of blood glucose stimulates orexin, which results in ravenous eating. |
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| ventromedial hypothalamus |
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-Depresses hunger (stimulation)
-Destroy it= animal eats excessively & becomes obese |
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Definition
-Body monitors lipid levels
-Levels too low, hunger is signal
-The basis for "set point" idea of weight gain/loss |
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-Binges of eating and vomiting
-Mainly adolescent women |
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-Severe restriction of eating, increase exercise- weight is about 85% of normal
-Women 15-30 are the common factor |
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