) In Chapter 8 (The Water Soluble Vitamins), section 8.1 (What are Vitamins) discusses Absorption, Storage and Excretion of Vitamins, both water- and fat-soluble. How readily a vitamin can be absorbed and utilized by the body is called its bioavailability. Fat-soluble vitamins require _fatin the diet for absorption while water soluble vitamins, which include all B vitamins and vitamin , dissolve in water and depend on energy-requiring transport systems or need to be bound to specific molecules in the GI tract in order to be absorbed in the small intestine. Once absorbed into the blood, vitamins must be transported to the cells, mostly by being bound to _______________ for transport. Fat soluble vitamins, which include vitamins , , _ and _ are incorporated into ___________ for transport from the intestine. With the exception of vitamin B12, the water-soluble vitamins are easily excreted from the body in the urine. In contrast, fat-soluble vitamins are stored in the _ and ________ and cannot be excreted in the urine. Therefore it takes longer to develop a deficiency of fat-soluble vitamins when no longer provided in the diet. Because they are not stored to any great extent, supplies of water-soluble vitamins are rapidly depleted and must be consumed regularly in the diet, even though it may take more than a few days to develop deficiency symptoms, even if absent from the diet.

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter10: Fuels, Organic Chemicals, And Polymers

Section: Chapter Questions

Problem 119QRT

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) In Chapter 8 (The Water Soluble Vitamins), section 8.1 (What are Vitamins) discusses Absorption, Storage and Excretion of Vitamins, both water- and fat-soluble. How readily a vitamin can be absorbed and utilized by the body is called its bioavailability. Fat-soluble vitamins require _fat__in the diet for absorption while water soluble vitamins, which include all B vitamins and vitamin ______, dissolve in water and depend on energy-requiring transport systems or need to be bound to specific molecules in the GI tract in order to be absorbed in the small intestine. Once absorbed into the blood, vitamins must be transported to the cells, mostly by being bound to _________________________ for transport. Fat soluble vitamins, which include vitamins ______, ________, _________ and _______ are incorporated into ___________________ for transport from the intestine. With the exception of vitamin B12, the water-soluble vitamins are easily excreted from the body in the urine. In contrast, fat-soluble vitamins are stored in the ___________ and ____________ and cannot be excreted in the urine. Therefore it takes longer to develop a deficiency of fat-soluble vitamins when no longer provided in the diet. Because they are not stored to any great extent, supplies of water-soluble vitamins are rapidly depleted and must be consumed regularly in the diet, even though it may take more than a few days to develop deficiency symptoms, even if absent from the diet.

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