Quick Answer: Which Statement Is True Regarding Absorption Of Dietary Vitamin B12?

Which of the following is required for the absorption of vitamin B12?

Two steps are required for the body to absorb vitamin B12 from food. First, hydrochloric acid in the stomach separates vitamin B12 from the protein to which vitamin B12 is attached in food. After this, vitamin B12 combines with a protein made by the stomach called intrinsic factor and is absorbed by the body.

Where is B12 absorbed quizlet?

Terms in this set (8)

B12 links with Intrinsic Factor and travels to the Ileum. B12 is absorbed and transferred to the blood transport protein to the Liver for storage or circulation.

Is required for absorption of vitamin B12 quizlet?

Adequate absorption of vitamin B12 requires adequate dietary intake, the presence of acid and pepsin in the stomach and proteases from the pancreas, functional intrinsic factor in gastric secretions, and an ileum with functioning receptors specific to vitamin B12.

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What is the primary site for vitamin B12 absorption?

The ileum is the major site of absorption of vitamin B12 analogues.

What causes a B12 deficiency?

However, the most common cause of vitamin B-12 deficiency anemia is a lack of a substance called intrinsic factor, which can be caused when your immune system mistakenly attacks the stomach cells that produce this substance. This type of anemia is called pernicious anemia.

How do you increase B12 absorption?

We already know from Harvard that B12 absorption can be increased by taking folate (another B vitamin, this one found in higher amounts in chickpeas, liver, pinto beans, lentils, spinach, asparagus, and avocado, among others).

Why does vitamin B12 absorption decrease with age quizlet?

synthesis of vitamin B12 by intestinal bacteria. Older adults may produce less intrinsic factor, which may decrease vitamin B12 absorption. Vitamin B12 absorption is not affected by intestinal motility or bile production.

What is the blood test for a B12 deficiency?

When a B12 level is normal or low normal but a deficiency is still suspected, a healthcare practitioner may order a methylmalonic acid (MMA) test as an early indicator of B12 deficiency. A low B12 and/or folate level means that you have a deficiency.

What is necessary for the absorption of vitamin B12 from the intestines quizlet?

Which specialized cell in the stomach produce a substance needed for adequate intestinal absorption of vitamin B12? Parietal cells produce hydrochloric acid and a substance called intrinsic factor, which is needed for adequate intestinal absorption of vitamin B12.

What is the main cause of vitamin B12 deficiency quizlet nutrition?

Where is vitmain B 12 found? A form of macrocytic anemia that is the primary cause of a vitamin B12 deficiency; occurs at the end stage of an autoimmune disorder that causes the loss of various cells in the stomach.

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What is vitamin B12 known as?

Cobalamin; Cyanocobalamin. Vitamin B12, also called cobalamin, is one of 8 B vitamins. All B vitamins help the body convert food (carbohydrates) into fuel (glucose), which is used to produce energy. These B vitamins, often referred to as B complex vitamins, also help the body use fats and protein.

Which group may be at risk for vitamin B12 deficiency?

Vegans (people who don’t eat any meat, dairy, or eggs) are most at risk for developing a B12 deficiency because, aside from fortified breakfast cereals, the only reliable dietary sources of vitamin B12 are animal-derived products.

Can you absorb B12 without intrinsic factor?

A small amount of vitamin B12 is absorbed by passive diffusion without intrinsic factor.

How and where is vitamin B12 absorbed?

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.

How long does it take to recover from B12 deficiency?

Recovery from vitamin B12 deficiency takes time and you may not experience any improvement during the first few months of treatment. Improvement may be gradual and may continue for up to six to 12 months.

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