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The nurse is aware that vitamin B12 is absorbed in the:

A.

Duodenum

B.

Stomach

C.

Small intestine

D.

Large intestine

Answer and Explanation

The Correct Answer is C

A.    The duodenum is the first part of the small intestine where a significant amount of digestion takes place, but vitamin B12 is primarily absorbed in the lower part of the small intestine, called the ileum.
B.    The stomach plays a role in releasing intrinsic factor, which helps in the absorption of vitamin B12, but the actual absorption occurs in the small intestine.
C.    Vitamin B12 absorption primarily occurs in the lower part of the small intestine (ileum), facilitated by intrinsic factors.
D.    The large intestine primarily absorbs water and electrolytes; it is not a site for vitamin B12 absorption.
 


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Related Questions

Correct Answer is B

Explanation

A. Vitamin D is a fat-soluble vitamin that the body can store; it is not water-soluble.
B. Vitamin C is a water-soluble vitamin, essential for various bodily functions, and needs to be replenished regularly as the body doesn't store it.
C. Vitamin E is a fat-soluble vitamin stored in the body's fatty tissues and organs, not water-soluble.
D. Vitamin A is also a fat-soluble vitamin stored in the liver and fatty tissues, not water-soluble.

Correct Answer is C

Explanation

A. The duodenum is the first part of the small intestine but is not the primary site for vitamin B12 absorption. It's primarily absorbed in the lower part of the small intestine called the ileum.
B. While the stomach plays a role in releasing intrinsic factor that aids in B12 absorption, the actual absorption occurs in the small intestine, particularly the ileum.
C. Vitamin B12 absorption primarily occurs in the lower part of the small intestine, facilitated by intrinsic factors.
D. The large intestine is mainly responsible for water absorption and electrolyte balance, not vitamin B12 absorption.

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