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

Duodenum

Stomach

Small intestine

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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Correct Answer is B

Explanation

A. Spinach contains iron, but it's a non-heme source of iron, which is less readily absorbed by the body compared to heme iron.
B. Chicken contains heme iron, which is more easily absorbed by the body compared to non-heme iron found in plant-based sources.
C. Dried apricots contain non-heme iron, which is less easily absorbed than heme iron.
D. Lentils contain non-heme iron, which is also less easily absorbed compared to heme iron sources like chicken.

A. Starches B. Fat C. Protein D. Fiber

Correct Answer is A

Explanation

A. Saliva contains enzymes like amylase that break down starches into simpler sugars, initiating their digestion in the mouth.
B. Fat digestion primarily starts in the small intestine with the action of bile and pancreatic lipase.
C. Protein digestion begins in the stomach with the action of enzymes like pepsin.
D. Fiber is not digested by enzymes in the human digestive system, though it aids in digestion and promotes bowel movements.

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

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A nurse is reinforcing dietary teaching with a client who has iron deficiency anemia. The nurse should explain that which of the following food sources contains iron that is most easily absorbed by the body?

Correct Answer is B

Explanation

The nurse reminds the patient that the salivary glands excrete saliva, which starts the digestion of

Correct Answer is A

Explanation

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

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