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 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.
Correct Answer is B
Explanation
A. Routine admissions under managed care plans might not require patients to be admitted several days before the procedure; often, it depends on the nature of the procedure or treatment.
B. Patients admitted under managed care plans usually require preapproval or authorization from the insurance company or managed care organization before admission for non-emergency procedures.
C. Payment of deductibles can vary based on the specific terms of the insurance plan, but it's not necessarily tied to the admission process under managed care plans.
D. Medicare is a government-sponsored health insurance program for individuals aged 65 and older or those with certain disabilities, but it's not directly related to the process of routine admission under managed care plans.
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