An elderly lady is diagnosed with pernicious anemia. The nurse caring for this patient knows that intrinsic factor, which combines with dietary B12, is secreted by what?
A) Small intestine
B) Lower esophagus
C) Colon
D) Gastric mucosa
Ans: D
Feedback: Intrinsic factor, also secreted by the gastric mucosa, combines with dietary vitamin B12 so that the vitamin can be absorbed in the ileum. This makes options A, B, and C incorrect.
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