insoluble fiber definition
insoluble fiber that not soluble in water, composed mainly of lignin, cellulose, and hemicelluloses and primarily found in the bran layers of cereal grains.Its actions include increasing fecal bulk and decreasing free radicals in the gastrointestinal tract.rude fiber the fiber that remains after food is digested with alkali and acid, which destroys all soluble and some insoluble fiber. It is mainly lignin and cellulose. depressor f's afferent nerve fibers that when stimulated reflexly cause diminished vasomotor tone and thus decreased arterial pressure.
Fiber, soluble and insoluble: Fiber (the portion of plants that cannot be digested by the human digestive tract) is classified as soluble and insoluble.Oats, beans, dried peas, and legumes are major sources of soluble fiber whereas wheat bran, whole grain products, and vegetables are major sources of insoluble fiber.or example, soluble fiber delays the time of transit through the intestine whereas insoluble fiber speeds up intestinal transit. For another example, soluble fiber and may decrease the level of cholesterol in the blood whereas insoluble fiber has no effect on serum cholesterol.