Lecture 17 Energy Balance - Lecture 17: Energy Balance,...

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Monday, 4/5/10 Energy Balance Energy in (food you eat) --- Energy out (expenditure) +: you eat more energy than you use –gain weight –: you eat less energy than you use –lose weight children need + energy balance to grow adults need – energy balance to maintain weight daily fluctuations 1 st Law of Thermodynamics: Conservation of Energy energy can't be created nor destroyed, It can only change into different forms Food intake – energy utilization = Change in stored energy Body Energy Stores Short term supply glycogen (stored in liver + muscles) Long term supply fat in adipose tissue protein in muscle balance scale: food intake = energy expenditure Weight Gain = expand energy stores (fat in adipose tissues) Weight Loss = Deplete energy stores fat in adipose tissue used for energy protein in muscle used to make new glucose Global Prevalence of Underweight Risks for Child Being Underweight nutritional def. Disease, eg: Anemia, scurvy increased risk of infection Can be indicator of failure to thrive—social factor disrupting growth? can be indicator of primary disease HIV infection, tuberculosis, cancer OR: can be simply “normal” for his/her genetic makeup, with NO risk factors at all! Just being underweight does not mean the child had an illness, not diagnostic tools
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This note was uploaded on 11/02/2011 for the course NST 10 taught by Professor Amy during the Spring '08 term at University of California, Berkeley.

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Lecture 17 Energy Balance - Lecture 17: Energy Balance,...

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