BIO 111 Lecture Notes - Lecture 28: Psyllium, Digestion, Broccoli
6 Jan 2021
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Sources of dietary fiber (g/serving not shown in pyramid b/c varies tremendously across foods in each group. For example, 3g in rolled oats and 9g in bran cereal, and 7g in kidney beans and 3 in green peas) primary sources indicate that a serving will provide at least 2g of fiber per serving) Primary sources: most whole cereal grains(oat bran, bran cereal, rolled oats, whole wheat bread, etc. ) Not juices: vegetables (broccoli, carrot, potato, etc. , legumes (kidney beans, pinto beans, lentils, green peas, etc. ) Digestion cho dig/abs is highly efficient. nearly 97-97%cho input is absorbed. Cho digestion in mouth: enzymes: salivary amylase mixes with food in preparation for swallowing- begin to convert starch to disaccharides to monosaccharide. Cho digestion in small intestine: enzymes: (some salivary amylase goes with swallow), pancreatic amylase, sucrase, lactase, maltase. if a person doesn"t have lactase to break lactose= lactose intolerance. Dietary fiber remains intact in the gastrointestinal tract.
