L19-Hunger

L19-Hunger - Eating and Hunger Satiety does not equal...

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Eating and Hunger Satiety does not equal restored nutrients o Satiety: state of being full; lack of hunger Metabolic Phases o Body uses energy continuously, but consumption is intermittent; therefore, it must store energy. o Fasting Phase Short-term reservoir: Glucose Glycogen (Stored by liver) Glucose is converted to Glycogen by insulin and converted back to glucose by glucagon (secreted by pancreas) Long-term: Fat (Triglycerides) Glucose o Absorptive Phase Occurs when food is being digested and glucose levels begin to rise Rise in Glucose Increased insulin production Nutrients not used as energy are stored (glycogen and fat) o Brain uses majority of available glucose o Glucose transport into neurons/glia does NOT require insulin Therefore, they can se glucose even when insulin is absent Necessary because brain does not have fatty acid transporters, can only use glucose for energy Hunger Initiation Signals o Environmental and Social Factors Time of day, olfactory/visual/auditory stimulation, psychological
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L19-Hunger - Eating and Hunger Satiety does not equal...

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