Human Nutrition Study Guide – Flashcards
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Known as Starches, Sugars and Fibers
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Carbs
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Known as Triglycerides, Phospholipids and Sterols
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Fats (Lipids)
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Made (synthesized) from basic building blocks called Amino Acids
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Proteins
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Subdivided into two separate groups by solubility in water or fat so we have water-soluble and fat-soluble.
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Vitamins
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Subdivided into two separate groups by the amount present in the body, Major or Trace.
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Minerals
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__________ and __________ has 4 kcals for each gram
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Carbohydrate, Protein
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_____ has 9 kcals per gram
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fat
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The amount of heat necessary to raise the temperature of one liter of water one degree Celsius. In this course, we talk alot about calories in food, a measurement of the heat energy in the food.
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Calorie
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means the body cannot make them
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Essential
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_________ is considered a psychological response to the environment
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Appetite
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substances in plants that may possess health-protective effects, even though they are not essential for life
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Phytochemicals
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Carbohydrate __% to __% of total calories
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45 to 65
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Fat __-__% of total calories
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25-35
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Protein __-__% of total calories
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10-35
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a "spreadsheet" listing the known essential nutrients and the amount of each nutrient a person needed each day to remain healthy.
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RDA
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Standards for nutrient intake
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RDA
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RDA=Recommended _________ _____________
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Dietary Allowances
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DRI= ________ ________ __________
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Dietary Reference Intakes
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Dietary Guidelines messgage is that you should balance ______ and _______ ___________.
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Foods, physical activity
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__________ ___________ reflects the nutrient content of a food in relation to its energy (kcal) content.
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nutrient density
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________ _________ indicates that there isn't enough data to estimate an EAR, thus it is defined as the quantity of intake consumed by groups with no evidence of inadequate nutrient intake.
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Adequate Intake (AI)
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Nutrients with an ___ do not have an _____
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AI, RDA
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recommended daily amount of a nutrient; used on food labels to help people see how a food fits into their diet
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Daily Value
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Represent standards derived from the 1968 RDA (Recommended Dietary Allowances) known as the RDIs (Reference Daily Intakes) and DRVs (Daily Reference Values). , recommended daily amount of a nutrient; used on food labels to help people see how a food fits into their diet
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Daily Value
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ABCDEs of nutrition:
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anthropometric, biochemical, clinical, dietary, and ecomonic
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participates in the regulation of metabolism, reproduction, water balance, and many other functions.
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Endocrine System
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As blood passes through the digestive tract, it picks up water-soluble nutrients for delivery to the liver through the __________ __________.
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portal vein
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____________ nutrients have to take a couple laps around the body in order to get to the liver.
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Lymphatic
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_____-___________ nutrients are lacteal or lymphatic nutrients
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fat-soluble
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Where does most digestion take place?
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Small intestine
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What two places are most digestive enzymes produced?
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pancreas and small intestine
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a ring of muscle that contracts to close an opening
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sphincter
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The ______ __________ sphincter separates the esophagus from the stomach
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lower esophageal
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The _______ sphincter separates the stomach from small intestine
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pyloric
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The _________sphincter separates the small intestine from the large intestine
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Ileocecal
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______coats the digestive tract from mouth to anus, so all the chemicals associated with digestion are separated from the cells that make up the tract.
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Mucus
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_____ protects the large intestine from bacterial activity and holds fecal matter together
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Mucus
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Where is bile produced?
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liver
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Where is bile stored?
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gallbladder
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involuntary waves of muscle contraction that keep food moving along in one direction through the digestive system
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Peristalsis
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A protein catalyst that speeds up the rate of a chemical reaction. It is not altered by the reaction
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enzyme
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Partially digested, semiliquid food mixed with digestive enzymes and acids in the stomach.
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Chyme
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Projection of the small intestinal wall that extends into the lumen. Participates in digestion of foods and absorption of nutrients.
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Villi
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The ______ are one cell thick and absorb the nutrients to deliver them to the blood or lymph
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villi
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The stomach acid flows up the esophagus causing a burning sensation called heartburn or _________
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GERD
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Whe this disease goes untreated it may initiate esophageal cancer
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GERD
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any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions
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Enzyme
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What rolls and mixes the contents of the colon, and divides it into smaller particles in preparation for elimination from the body.
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Large intestine
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The ______ __________ absorbs water and some minerals from chyme. It collects any material that won't be absorbed and "packages" it for disposal.
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large intestine
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The bacteria in the _____ ________have large amounts of foodstuffs to metabolize which produces gas.
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large intestine
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_______ _______are polysaccharides and that we cannot digest them
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Dietary fibers
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_______ protects the body from having to use body or dietary protein as a replacement for the blood sugar, glucose
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Starch
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Extra glucose is converted to ______, the plant's storage form of energy
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starch
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On a 2000 kcal diet, 55-60% is ___-___ grams of carbohydrate per day.
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275-300
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A _______ _________ can be absorbed into the body without any change in its chemical structure
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simple carbohydrate
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enzyme in saliva that breaks the chemical bonds in starches
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Amylase
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undigested _____ provides energy to the cells that make up the large intestine.
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starch
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Lactose intolerance is cause by a deficiency of what?
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lactase
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3 symptoms of lactose intolerance.
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Diarrhea, gas, cramps
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What is the bodies primary energy source?
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glucose
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Insulin in the hormone that treats what disease?
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Hyperglycemia
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Glucagon corrects what disease?
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Hypoglycemia
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What causes an immediate increase in blood glucose?
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Epinephrine
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__________ is the storage form of carbohydrate in humans and other animals.
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glycogen
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__________ in muscle and liver tissue provides a constant supply of glucose, so that we can go without eating between meals, and most of overnight.
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glycogen
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Where is glycogen stored?
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muscles and liver
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For fiber intake, it is recommended that men have about _____ grams, while women have about ____ grams
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38, 25
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once dietary carbohydrates are in the liver they are all changed to ________.
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glucose
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the liver releases the glucose into the______for delivery to all tissues needing glucose.
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blood
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Excess glucose won't be wasted because the liver will change it into ______, and hold it in liver tissue until it is needed. If, the ******** stores are full and the body doesn't need energy from glucose, the extra glucose will be converted to____.
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fat, glycogen
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Digestion begins in the _______
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mouth
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•_________ obesity (a waistline over 35 inches in women and 40 inches in men) •__________ of 150 of higher •Low ______ (lower than 40 in men and lower than 50 in women) •_______ __________of 130/85 mm Hg or higher •Fasting ______of 110 mg/dL or higher
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abdominal, Triglycerides, HDL, Blood pressure, glucose
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A triglyceride is formed when one molecule of _________ (a common alcohol) combines with __ fatty acids
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glycerol, 3
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__________ are the major form of fat in foods and the way the human body stores fat in adipocytes or fat cells.
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Triglycerides
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A fatty acid is __________ if it has no double bonds on the carbon chain
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saturated
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One or more double bonds make the fatty acid __________
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unsaturated
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Being ___________ is nothing more than a carbon to carbon chemical bond missing 2 hydrogens.
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unsaturated
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A____________chemical bond has two adjacent carbons, each carrying a full load of hydrogens
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saturated
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In order to reduce LDL levels, it has been recommended that the amount of _________ fat in the diet be held at or below 10% of total calories.
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saturated
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Studies show that ___________ fats are better than __________ fats at decreasing LDL.
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monounsaturated, polyunsaturated
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the process of converting unsaturated fats to saturated fats by adding hydrogen
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hydrogenation
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__________ __________ can attack the emulsified fat particles and change them into monoglycerides and free fatty acids so they can be absorbed through the intestinal wall.
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pancreatic lipase
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juice with lipid-digesting enzymes
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lipase
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______ is good cholesterol
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HDL
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Lipoprotein made of triglycerides and cholesterol surrounded by a shell of phospholipids and proteins. They are made in the intestinal wall from absorbed dietary lipids, and travel through the lymphatic system to the blood by way of the right side of the heart.
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Chlyomicron
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Transports lipids from the intestinal cells to the body
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Chlyomicron
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The 2 essential fatty aacis
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Alpha-Linolenic , Linoleic
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Essential fatty acis are impornat for vision, immunity and _________
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prostaglandins
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________ sources of cholesterol are foods of animal origin.
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Dietary
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Unsaturated fatty acids that make almost all ________at room temperature can be saturated with the addition of hydrogen
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oil liquids
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By adding hydrogen to the carbon-to-carbon double bonds, it is possible to create single bonds, thus producing a ______ _____ at room temperature.
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solid fat
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chylomicrons pass from the intestinal cell into the _______ _________ (lacteals), not the blood.
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lymph vessels
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shorter chain fats do not have to rely on the chylomicron to carry them into the body, but they can go directly into the _____ _______ just like the monosacchardies did
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portal vein
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Normally, LDL particles are taken up by cells in need of cholesterol or cleared by the ______
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liver
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Exposure to ultraviolet radiation (sunshine) 15 minutes per day, several times a week will allow us to make all the __________ ___ we need
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vitamin D
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_______ has 7 kcal per gram
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alcohol
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`We need ___________ in our diets primarily to help satisfy the calorie needs of our body cells.
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carbs
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_________ is the main structural material in the body.
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Protein
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_________ are the main forms of energy storage for the body.
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Triglycerides
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a unit of heat equal to the amount of heat required to raise the temperature of one kilogram of water by one degree at one atmosphere pressure
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kilocalorie
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The AMDR for carbohydrates is __ to __ percent of total calories.
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45 to 65
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A state in which there is no longer a desire to eat
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satiety
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Based on a 2000 kcal diet
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daily value
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What macronutrient has an RDA?
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Protein
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RDAs, EARs, AIs, EERs, and ULs are all considered to be what?
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DRIs
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A ________ _________ makes a direct reference to a nutrient and a reduction in risk of a particular disease. There is scientific justification behind these claims and the FDA has given approval for their use on particular foods.
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health claim
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can claim product affects body function (e.g.- maintains lean body mass) NOT FDA approved or necessarily valid
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Structure Function Claim
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The study of how disease rates vary among different population groups
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epidemiology
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Nitrogenous waste product of protein metabolism; major source of nitrogen in the urine
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urea
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a muscle that constricts after food enters the stomach
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esophageal sphincter
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essential for the digestion and abosorption of fat.
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bile
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Most of the digestion and absorption of food occurs where?
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small intestine
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The movement of molecules from areas of HIGH concentration to areas of LOW concentration. (NO ENERGY USED) Fats, water and some monerals are abosorbed this way
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passive diffusion
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In addition to the need for a carrier protein, some nutrients also require energy input to move from lumen of the small intestine into the aborptive cells. This makes it possible fro cells to take up nutrients even when they are consumed in low concetrations. Some sugrs, such as glucose, are actively absorbed, as are amino acids
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Active absorption
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a semiliquid mass of partially digested food that passes from the stomach through the pyloric sphincter into the duodenum
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chyme
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3 most common monosaccharides are:
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glucose, frustose and glactose
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sucrose= glucose + ________
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fructose
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Lactose= glucose + ________
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galactose
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Maltose= glucose+ ________
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glucose
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What is the main carb in our bodies?
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glucose
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surgars are considered _______ carbs
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simple
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fibers and starches are considered ________ carbs
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complex
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________ fibers (pectin, gums, mucilages) are found in the skins and flesh of many fruits
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soluble
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_________ fibers include cellulose, hemicellulose
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insoluble
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When it comes to your heart health, it appears that only _________ fiber is beneficial in lowering your cholesterol.
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soluble
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A hormone produced by the pancreas. It increases the synthesis of glycogen in the liver and the movement of glucose from the bloodstream
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insulin
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Triglyceride is composed of 3 fatty acids bonded to glycerol, a(n) ________
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alcohol
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_______________ is used to convert liquid oils into more solid fats, used to make margarine and shortening. Tans fatty acids are a product of this
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hydrogenation
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long chain saturated fats are _____ at room temp
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solid
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Medium or short chain saturated fats are _____ at room temp
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soft or liquid
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carries dietary fat from the small intestine to cells
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chylomicron
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Carries lipids make and taken up by the liver
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VLDL
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Carries cholesterol made by the liver and from other sources to cells
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LDL
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Contributes to cholesterol removal from cells and, in turn, excretion of it from from the body
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HDL
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You should keep your cholesterol to under _____mg
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300