EnergyIntakeandExpenditure - I Energy Balance A Energy...

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I. Energy Balance A. Energy intake 1. energy consumed: a) carbohydrate b) fat c) protein 2. once energy is taken in, it is stored until used 3. carbohydrates- ingested as: a) complex sugar - starch in bread or potatoes b) simple sugar - glucose or fructose 4. after meal-absorbed sugars are taken up by: a) blood b) heart-accepts glucose-used for energy c) skeletal muscle-accepts glucose as glycogen -used when needed d) liver-takes simple sugars from blood *all in this order 5. glucose level has been stored in liver, excess is stored as fat for later use Why are 80+ million Americans overweight to the point of obesity? Americans eat more fast foods and processed foods, and eat bigger portions. Many people are uneducated about nutrition and do not exercise enough to balance their eating habits. ANSWER: caloric intake exceeds expenditure Body Fat Measurement (weight in air)/(weight in water-weight in air) fat is less dense than bone fat weighs less per unit volume lean people sink college male average: 12.5% fat college female average: 25.0% fat 6. blood glucose also can be used by nerves, muscles, or other tissues in need of energy 7. fat - used mostly for energy a) carbohydrates used for excess work b) fat has more energy source c) carbohydrate storage requires a considerable amount of water 8. fat digestion: a) accomplished in the small intestine b) when fat is broken down, enters the bloodstream c) extra fat is stored in liver for energy reserve
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9. proteins=10% source of energy *average values for body fat according to age or sex Age Men % Women % 15 12.0 21.5 18-22 12.5 25.7 23-29 14.0 29.0 30-40 16.5 30.0 40-50 21.0 32.0 obesity : excessive accumulation of fat beyond normal men -defined as 20% above fat women -defined as 30% above fat dieting : body turns to protein
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  • Fall '14
  • EricDavis
  • Energy, energy expenditure, Body weight, body fat measurement

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