NR 228- Nutrition Wk 3 Questions With Complete Solutions

Major Functions of Fats in Body correct answer: functions: - source of energy- 9 kcal/g of fat - palatability (makes food taste and smell good) - satiety and satiation (prevents hunger between meals) - food processing - nutrient source (transport vitamins A, D, E, and K) physiological functions - stored energy - organ protection - temp regulation (lives under skin, insulation) - insulation Structures and Sources of Triglycerides correct answer: saturated fatty acids: single bond - meats (beef, lamb, egg yok, dairy), plants (tropical oil), butter fat, shortening, vegetable oils monounsaturated: one unsaturated double bond - olive oil, peanuts (peanut butter and oil), canola oil polyunsaturated: two or more unsaturated double bonds - omega 3 - omega 6: vegetable oil, fish, margarine Structures and Sources of Phospholipids and Sterols correct answer: phospholipids: - forms part of a cell membrane structure - serves as emulsifiers to keep fats dispersed in body fluids - has only 2 fatty acid - not an essential nutrients - synthesized by the body sterols: - the liver produces the amount of cholesterol required for the body to function - synthesized by the body - food source for cholesterol are animals: pork, chicken, eggs, luncheon meats, milk, cheese, butter (dairy), fish, and beef Digestions, Absorption, and Transportation of Lipids in the Body correct answer: digestion: mouth, stomach, small intestines absorption: bile salts - moves lipids form lumen to villi for absorption, aids diffusion through the membrane metabolism: catabolism (breakdown of lipids for energy), anabolism (the synthesis of lipids to make triglycerides)