Nutrition & Digestion: Energy Nutrients, Essential Nutrients, Digestive Processes, Exams of Nutrition

Answers to questions related to nutrition and digestion, covering energy-yielding nutrients (proteins, fats, and carbs), essential nutrients, dietary reference intakes, legumes, whole grains, fortified foods, vegetarians, iron, non-heme iron, the gastrointestinal tract, small intestine, fiber, protein digestion, fat digestion, yogurt, glycogen, soluble fibers, insoluble fibers, insulin, glucagon, diabetes, lipoproteins, hdl and ldl, cholesterol, omega-3 fatty acids, hemoglobin, antibodies, high-quality proteins, fibrin, basic units broken down from nutrients, fat storage, glycolysis, fasting, ketone bodies, and ketosis.

Typology: Exams

2023/2024

Available from 04/04/2024

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Nutrition Final Exam solution 2024
Energy-yielding Nutrients - ANS>> the nutrients that break down to yield energy the
body can use; protein, fat and carbs
Kcals/g for energy-yielding nutrients - ANS>> proteins/carbs-4, fat-9, alcohol-7
Essential Nutrients - ANS>> nutrients that must come from food because our bodies
cannot produce it in sufficient amounts to meet physiological needs
Dietary Reference Intakes (DRI) - ANS>> a set of nutrient intake values for healthy
people in the U.S. and Canada
Recommended Dietary Allowance (RDA) - ANS>> the average daily amount of
nutrient considered adequate to meet the known nutrient needs of practically all healthy
people
Legumes - ANS>> group of plants that include beans and peas; generally low in fat
and are nutrient and fiber rich; examples- black beans, kidney beans, peanuts
Discretionary Calories - ANS>> the kcalories remaining in a person's energy allowance
after consuming enough nutrient-dense foods to meet all nutrient needs for a day
Whole Grains - ANS>> a grain that maintains the same relative proportions of starchy
endosperm, germ, and bran as the original; at least half of grains should be whole; look
for "whole grain" as one of first things in ingredient list
Fortified foods - ANS>> the addition to a food of nutrients that were either not originally
present or present in insignificant amounts; cereal is highly fortified
Vegetarians - ANS>> people who exclude meat, poultry, fish or other animal-derived
foods from their diets
Iron in Vegetarians - ANS>> RDA for iron is higher in vegetarians; iron absorption
enhanced by Vitamin C; vegetarians are no more iron deificient than other people
Non-heme iron - ANS>> Iron found in non-meat based foods; can be found in
vegetables, grains, iron-fortified cereals and legumes; not absorbed by the body as well
as heme iron
Gastrointestinal (GI) Tract - ANS>> a flexible muscular tube that extends from the
mouth, through the esophagus, stomach, small intestine, large intestine, and rectum to
anus
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Nutrition Final Exam solution 2024

Energy-yielding Nutrients - ANS>> the nutrients that break down to yield energy the body can use; protein, fat and carbs Kcals/g for energy-yielding nutrients - ANS>> proteins/carbs-4, fat-9, alcohol- 7 Essential Nutrients - ANS>> nutrients that must come from food because our bodies cannot produce it in sufficient amounts to meet physiological needs Dietary Reference Intakes (DRI) - ANS>> a set of nutrient intake values for healthy people in the U.S. and Canada Recommended Dietary Allowance (RDA) - ANS>> the average daily amount of nutrient considered adequate to meet the known nutrient needs of practically all healthy people Legumes - ANS>> group of plants that include beans and peas; generally low in fat and are nutrient and fiber rich; examples- black beans, kidney beans, peanuts Discretionary Calories - ANS>> the kcalories remaining in a person's energy allowance after consuming enough nutrient-dense foods to meet all nutrient needs for a day Whole Grains - ANS>> a grain that maintains the same relative proportions of starchy endosperm, germ, and bran as the original; at least half of grains should be whole; look for "whole grain" as one of first things in ingredient list Fortified foods - ANS>> the addition to a food of nutrients that were either not originally present or present in insignificant amounts; cereal is highly fortified Vegetarians - ANS>> people who exclude meat, poultry, fish or other animal-derived foods from their diets Iron in Vegetarians - ANS>> RDA for iron is higher in vegetarians; iron absorption enhanced by Vitamin C; vegetarians are no more iron deificient than other people Non-heme iron - ANS>> Iron found in non-meat based foods; can be found in vegetables, grains, iron-fortified cereals and legumes; not absorbed by the body as well as heme iron Gastrointestinal (GI) Tract - ANS>> a flexible muscular tube that extends from the mouth, through the esophagus, stomach, small intestine, large intestine, and rectum to anus

Small Intestine - ANS>> 10-foot length of intestine that is the major site of digestion of food and absorption of nutrients; the segments are called the duodenum, jejunum, and ileum Pyloric Sphincter - ANS>> allows passage from stomach to small intestine; prevents backflow from small intestine Villi - ANS>> Small fingerlike projections on the walls of the small intestines that increase surface area Carbohydrate Digestion - ANS>> begins in the mouth, continues until it's mixed with gastric juices; the stomach acid of gastric juices deactivates salivary enzyme and carb digestion ceases; picks up when pancreas sends enzymes to small intestine to break down starch into small segments that can be absorbed through the intestinal walls into the hepatic portal vein; digested fast Fiber - ANS>> structural parts of plants found in vegetables, fruits, whole grains, and legumes; promote healthful GI tract Protein Digestion - ANS>> begin to uncoil when mixed with gasric acid, making them available to gastric enzymes that begin to digest proteins; small fragments are absorbed through the small intestinal wall into the hepatic portal vein; makes us feel most full Fat Digestion - ANS>> form a layer on top of watery mixture in stomach; emulsified by bile, lipases begin to break them down into small fragments that can be absorbed through small intestine into lymph; digested slowest Yogurt - ANS>> milk product that promotes a healthful GI tract with use of probiotics Glycogen - ANS>> storage form of glucose stored in the liver and muscles Soluble Fibers - ANS>> dissolve in water commonly found in oats, barley, legumes and citrus fruits; protect against heart disease and diabetes by lowering blood cholesterol and glucose levels Insoluble Fibers - ANS>> do not dissolve in water commonly found in whole grains and vegetables; promote bowel movements, alleviate constipation, and prevent diverticular disease Insulin - ANS>> hormone that decreases blood sugar; people with diabetes don't produce enough Glucagon - ANS>> hormone that raises blood sugar levels; when glucose is gone glucagon gets released

Most satiating macronutrient - ANS>> protein Basal Metabolic Rate (BMR) - ANS>> the rate of energy use for metabolism under specified conditions; affected by activity, amount of lean muscle, weight, age, height Body Composition - ANS>> the proportions of muscle, bone, fat, and other tissue that make up a person's total body weight Body Mass Index (BMI) - ANS>> a measure of a person's weight relative to height; determined by dividing the weight by the square of the height; doesn't work in people who are very muscular; not! reflected by body composition Apple Shaped - ANS>> upper body fat; most common in men; more closely associated with chronic diseases Pear Shaped - ANS>> lower body fat; most common in women; not! associated with chronic diseases Anorexia Nervosa - ANS>> eating disorder characterized by a refusal to maintain a minimally normal body weight and a distortion in perception of body shape and weight Treatment of Anorexia Nervosa - ANS>> requires multidisciplinary approach; first objective is to stop weight loss while establishing regular eating patterns; nutrition counseling; one of the highest mortality rates among psychiatric disorders Effective Weight Loss Strategies - ANS>> Set reasonable goals, eat smaller portions and more healthy with a well rounded diet and less fat, focus on fiber, lower carbs, watch for empty calories, physical activity Leptin - ANS>> a protein produced by fat cells that decreases appetite and increases energy expenditure; when body fat increases it increases aswell Ghrelin - ANS>> a protein produced by the stomach cells that enhances appetite and decreases energy expenditure; lack of sleep increases ghrelin Safe rate of weight loss - ANS>> 1/2 to 2 lbs per week Spot Reducing of Fat - ANS>> Ineffective; fat cannot be lost from one area alone but rather is lost from the whole body as a result of diet and regular exercise Water-soluble Vitamins - ANS>> vitamins B and C Fat-soluble Vitamins - ANS>> Vitamins A, D, E & K

Functions of B Vitamins - ANS>> help the body to use energy fuel from carbs, proteins and fat; some form part of coenzymes that assist in the release of energy but the vitamins alone do not provide energy Niacin Toxicity - ANS>> causes Niacin Flush- a temporary burning and itching sensation that occurs when a person takes a large dose of niacin acid Folate - ANS>> a B vitamin known as folic acid that helps convert vitamin B12 into one of it's coenzyme forms; without B12 folate cannot support DNA synthesis and cell growth; can mask a vitamin B12 deficiency Vitamin B12 - ANS>> Depends on folate for activation; bone cell activity and metabolism; most common deficiency symptom is anemia seen in folate deficiency where DNA synthesis slows Vitamin C Roles - ANS>> antioxidant, cofactor in collagen formation and other reactions, prevention and treatment of the common cold and disease prevention Key Antioxidant nutrients - ANS>> Vitamin C, vitamin E, beta-carotene and Selenium Vitamin C as an antioxidant - ANS>> significantly decreases the adverse effects of free radicals Vitamin C as an Antihistamine - ANS>> deactivates histamine which causes symptoms of the common cold such as nasal congestion Vitamin A Toxicity - ANS>> affects all body systems causing bone defect, birth defects Vitamin A Roles - ANS>> promotes vision, participates in protein synthesis and cell differentiation and supports reproduction and regulates growth Vitamin D Roles - ANS>> bone growth by assisting in the absorption of calcium and phosphorus Vitamin D Toxicity - ANS>> most likely to have toxic effects when consumed in excessive amounts; can cause excess calcium in the blood which can form kidney stones Vitamin E Roles - ANS>> antioxidant Vitamin E Toxicity - ANS>> rare; liver carefully regulates concentrations Vitamin K Roles - ANS>> helps in blood clotting and participates in the metabolism of bone proteins Vitamin K Toxicity - ANS>> not common and no adverse effects have been reported

Copper Deficiency and Toxicity - ANS>> deficiency is rare; excessive intakes from supplements may cause liver damage Components of Fitness - ANS>> aerobic (cardio), weight lifting, flexibility Progressive Overload Principle - ANS>> training principle that a body system, in order to improve, must be worked at frequencies, durations or intensities that gradually increase physical demands Sports Drinks - ANS>> should be drunk about an hour after activity but before that they are unnecessary Effective Repletion of Glycogen Stores - ANS>> Eat high carb meal within 15 mins after exercise; rate of storage is 300 times higher Fuel sources at various exercise intensities - ANS>> high/very high activity source is carbohydrate; moderate activity source is fat Diet for best physical performance - ANS>> Diet rich in carbs Pre-game Meal - ANS>> 3-4 hours before event; high carb and high fiber; too much fiber however can cause dehydration; between 300 and 800 kcalories Nutrient Depletion during exercise - ANS>> Drink water before, during and after exercise Diet related leading causes of death in US - ANS>> heart disease, stroke, diabetes, cancer, and cardiovascular disease Coronary Heart Disease - ANS>> Major cause of death for women in the US Best Diet for Hypertension - ANS>> DASH diet- high in potassium [fruits and vegetables], calcium [low fat dairy], and low in sodium Type 1 Diabetes - ANS>> insulin deficiency; onset at birth; only 5-10% of cases Type 2 Diabetes - ANS>> insulin resistance; adult onset; 90-95% of cases