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Define: Nutrition
The science of food; the nutrients and the substances therein.
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Define: Cholesterol
A waxy lipid found in all body cells; It has a structure containing multiple chemical rings (steroid structure). It is found only in foods that contain animal products.
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Define: Carbohydrate
A compound containing carbon, hydrogen, and oxygen atoms; most are know as sugars, starches, and fibers. Supplies 4 kcal/gram.
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Define: Proteins
Food and body components made of amino acids; contains carbon, hydrogen, oxygen, nitrogen, and sometimes other atoms, in a specific configuration. Contains the form of nitrogen most easily used by the body. Supplies 4 kcal/gram.
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Define: Lipids
A compound composed of much carbon and hydrogen, little oxygen, and sometimes other elements. Dissolves in either benzene, but not in water, and include fats, oils and cholesterol.
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Define: Minerals
Elements used in the body to promote chemical reactions and to form body structures.
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Define: Water
The universal solvent of life.
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Define: Kilocalorie (kcal)
The heat energy needed to raise the temperature of 1000 grams of water by 1 degree Celsius; Also written as a Calories with a capital C.
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Define: Macronutrient
A nutrient needed in gram quantities in the diet. Fat, protein, and carbohydrates.
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Carbohydrates...
- Chemical Name/Provides- Starches, Sugars,
- Purpose- Energy for movement, CO2/ATP
- Food Source- Grains, Cereals, Starchy Vegetables, Milks (&Yogurt), Legumes, Fruit.
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Proteins...
- Chemical Name/ Provides- Amino acid, Peptide
- Purpose- Energy for tissue development, structure, Hormones, Signaling Molecules, Osmolarity in blood
- Food Source- Meats, Fish, Dairy (Cheeses & Milk), Legumes (Nuts & Seeds)
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Lipids (fats)...
- Chemical Name/ Provides- Triglycerides, Cholesterol, Phospholipids
- Purpose- Energy for storage, Cell signaling, Hormones
- Food Source- Fats and Oils, Nuts and Seeds, whole milks and cheeses, fatty meats and fish, avocado.
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What is the difference between fats and oils?
- Fats are solid at room temperature (like margarine, fake butter)
- Oils are liquid at room temperature (Like canola oil)
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What is the difference between saturated, unsaturated, and trans fats?
- -Saturated Fats- Contains no double bonds. A fat consisting of triglycerides containing only saturated fatty acid.
- -Unsaturated Fats- A fatty acid that consists of one or more double bonds in the fatty acid chain.
- -Trans Fat- An unsaturated fatty acid formed by the partial hydrogenation of vegetable oil, believed to raise blood cholesterol levels.
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Be able to determine kcal and percentages from each macronutrient in a food or diet.
An example...?
- Fat: 15 g x 9 Kcal/gram= 135 kcal
- Carbohydrate: 33 g x 4 kcal/gram= 132 kcal
- Protein: 12 g x 4 kcal/gram= 48 kcal
Total Calories: 135 + 132 + 48 = 315
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What are the three major categories of nutritional science?
- -Epidemiology
- -Animal Studies
- -Cell Culture
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Define the three major categories of nutritional science?
- A) Epidemiology:
- --Purpose- Show relationships between populations and disease RISK
- --Evidence- Correlation, not causation.
- B) Animal Studies:
- --Purpose- Provides preliminary data for human and cell culture studies.
- --Evidence- Direct relationship, but still not causation.
- C) Cell Culture:
- --Purpose- Provide preliminary data for human and animal studies
- --Evidence- Direct relationship, causation.
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What are the 10 red flags of “Junk” science?
- -Recommendation that promise a quick fix
- -Dire warnings of danger from a single product or regimen
- -Claims that sound too good to be true
- -Simplistic conclusions drawn from a single study
- -Recommendations based on a single study
- -Dramatic statements that are refuted by reputable scientific organizations
- -Lists of “good” and “bad” foods
- -Recommendations based on studies published without peer review
- -Recommendations from studies that ignore differences among individuals or groups.
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Understand the role of genetic background in the development of nutrition-related diseases.
- -Your DNA contains hereditary information
- -Gene products of DNA direct growth, maintenance and development
- -Genes, environment determine expression of traits
- -Genes, environment impact disease
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