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16 terms

Dietary Fiber (chapter 4)

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fiber
--polysaccharide that can not be digested by human enzymes
--digested by bacteria
--adds bulk to feces
--comes from plants
dietary fiber
fiber found in food naturally
functional fiber
fiber added to food that must be associated with health benefits
total fiber
dietary+functional fiber
types of insoluble fiber
--cellulose (Celery, wheat)
--hemicellulose
--lignin (non carb, root veggies, wheat bran)
foods with insoluble fiber
--whole grains
--all plants
--wheat, rye, rice
--vegetables
physiological effects of insoluble fiber
--increases fecal bulk
--decreases intestinal transit time
types of soluble fiber
--pectins (apples, citris)
--gums (oatmeal)
--mucilages (beans)
--some hemicelluloses
foods with soluble fiber
--apples, bananas, oranges
--carrots
--barley, oats
--kidney beans
physiological effects of soluble fiber
--delays stomach emptying
--slows glucose absorption
--can lower blood cholesterol
foods generally high in fiber
whole grain products, fruit, veggies
beneficial effects of fiber
--promotes feeling of fullness
--prevents constipation, hemorrhoids
--prevents diverticulosis
--reduces blood cholesterol levels
--bile binds to it and is excreted
--slow digestion and absorption of carbs
--reduces risk of colon cancer
fiber DRI for 50 years <
males = 38g/day
females = 25g/day
fiber DRI for 50 years >
males = 30g/day
females = 21g/day
DV for fiber
25g/day
upper limit=40, lower limit=27
problems with too much dietary fiber
--gas
--feel full too fast
--bind and excrete minerals
--make stool hard (intestinal blocking)
-->60g/day