Carbohydrates, Lipids & Proteins Flashcards
what are carbohydrates?
sugars, starches, celluloses, and fiber
chief source of energy
what is a monosaccharide?
a single sugar unit (glucose, fructose, galactose)
what is a disaccharide?
two sugar units (sucrose, lactose, maltose)
what are polysaccharides?
long chains of monosaccharide units linked together (starch, fiber)
what is fiber?
complex carbohydrate
provides bulk in diet and intestinal health
regulates the absorption of glucose
what is soluble fiber?
dissolved by water
helps moderate blood glucose
lower cholesterol
what is insoluble fiber?
does not dissolve in water
what is glucose?
simple sugar made by the body from carbs, fats, and sometimes protein
the main source of fuel
what is glycogen?
complex carbohydrate used to store energy in the liver and muscle tissue
what is glycemic index?
the rate carb sources raise blood sugar and the effect on insulin release:
high = > 70 moderate = 56-69 low =< 55
what are the functions of lipids?
cellular membrane structure and function precursor to hormones cellular signals nutrient regulation protecting organs insulates the body prolongs digestion helps with satiety
what are the food sources of lipids?
monounsaturated (olive oil, avocados, peanuts)
polyunsaturated (sunflower oil, soy oil, omega 3s)
saturated (meat, coconut oil, dairy)
what are triglycerides?
the chemical form of most fat in food in the body
what is saturated fatty acid?
raises “bad” LDL cholesterol
what is trans fatty acid?
used to increase shelf life in foods
raises bad and lowers good cholesterols