Human Nutrition Lecture 6

Human Nutrition Lecture 6 - Human Nutrition Lecture 6...

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Human Nutrition Lecture 6 Aerobic Glycolysis -glucose is converted to pyruvate -pyruvate+Oxygen is converted to a 2 carbon molecule plus carbon dioxide Storing Glucose as Glycogen -insulin signals the body’s tissues to take up glucose from the blood stream -after a meal, when blood glucose rises, the pancreas responds by secreting insulin…the storage form of glucose is glycogen -2/3 fo the body’s glycogen is in the muscle, which keeps and uses the glucose for itself -1/3 of the body’s glycogen is in the liver, which shares the glucose with the whole body (can be depleted in a half day) Below a healthy minimum -DRI: daily min. of 130 grams/day (debatable)x 4 calories/gram=520 calories/day -in the absence of adequate carbs: Protein broken down to supply glucose Fat converted to ketones to provide brain with energy (this can lead to ketosis, and disrupt the body’s ac id-base balance) Glucose Homeostasis -don’t want to be either hypo or hyperglycemic -too much glucose , the liver clears it by converting to glycogen or converting to fat…too low, your release it form liver glycogen -glucose used first, then glycogen, then excess is converted to fat…carbs. are fattening only if you eat more calories, but carbohydrates are not fattening Recommendations for Carbs. Refined Sugar
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Human Nutrition Lecture 6 - Human Nutrition Lecture 6...

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