ANATOMY
GASTRO INTESTINAL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Vit. A
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Vit. C
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Vit. K
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intrinsic factor
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Detailed explanation-1: -Intrinsic factor is a glycoprotein produced by parietal cells in the stomach and necessary for the absorption of vitamin B12 in the terminal ileum. Once absorbed, vitamin B12 is used as a cofactor for enzymes that are involved in the synthesis of deoxyribonucleic acid (DNA), fatty acids, and myelin.
Detailed explanation-2: -A small amount of vitamin B12 is absorbed by passive diffusion without intrinsic factor.
Detailed explanation-3: -A special protein, called intrinsic factor (IF), binds vitamin B12 so that it can be absorbed in the intestines. This protein is released by cells in the stomach. When the stomach does not make enough intrinsic factor, the intestine cannot properly absorb vitamin B12.
Detailed explanation-4: -Normally, vitamin B12 is readily absorbed in the last part of the small intestine (ileum), which leads to the large intestine. However, to be absorbed, the vitamin must combine with intrinsic factor, a protein produced in the stomach.
Detailed explanation-5: -Beef, liver, and chicken. Fish and shellfish such as trout, salmon, tuna fish, and clams. Fortified breakfast cereal. Low-fat milk, yogurt, and cheese. Eggs. 05-Dec-2022