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Wright BIO 1150 - Digestion and Nutrition
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BIO 1150 1st Edition Lecture 7Topic Discussed: Digestion and NutritionAbsorption of carbs and proteins- Transported across mucosal cells of small intestine by specific membrane transport proteins - Protein transport –crucialAbsorption of fats- Digested fats coated by bile- Lymph- leakage from blood vessels (fat)- Fatty acids and monoglycerides diffuse into mucosal cells- Go into the lymphatic lacteals in villiNutrition- the needed amount of resources to amount for the body’s metabolic needs Gut capacity-adjustable (flexible)- Ie. Hibernation- gut shrinks in response to not eating for monthsNutrition- the provision of adequate resources to meet the body’s metabolic needs and to compensate for lossesEnergy- 1 Calorie = 1Kcal = 1000 calories- Daily energy spent is about 2000 caloriesFood Energy Values- Carbs- 4 cal/g- Protein- 4-4.5 cal/g- Lipids – 9 cal/gBody weight maintenance is a balanceSome animals are seasonally fatThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- They are a model for how obesity is regulated –leptinBody weight medical concerns- Obesity- excess weight/fat- Anorexia/bulimia- not enough weight/fatWeight loss- Most excess energy stored as fat (some stored as glycogen)- 1 lb= about 450g = about 4000 CaloriesMetabolism adjusts (if you eat the same diet for years your weight will plateau)- The type of food you eat influences physiologyo High glycemic foods-bado Low glycemic foods- better for youo This is because it takes longer for your body to digest low glycemic


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Wright BIO 1150 - Digestion and Nutrition

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