The nurse is aware that vitamin B12 is absorbed in the:
Duodenum
Stomach
Small intestine
Large intestine
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Glucose is a simple sugar and is readily broken down and absorbed by the body for energy.
B. Fiber, a type of carbohydrate, cannot be digested by human digestive enzymes. It passes through the digestive system intact, aiding in bowel movements and promoting gut health.
C. Glycerol is a component of triglycerides (fats) and can be metabolized by the body for energy.
D. Fatty acids are the building blocks of fats and are broken down by digestive enzymes for absorption.
Correct Answer is A
Explanation
A. Dark-colored urine is a common sign of dehydration, indicating concentrated urine due to reduced water intake or excessive fluid loss.
B. Dehydration typically causes dry or parched skin rather than moist skin.
C. Distended neck veins are not typical findings associated with dehydration; instead, they might indicate other conditions like heart failure.
D. Dehydration tends to cause a drop in blood pressure rather than high blood pressure due to reduced fluid volume.
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