Megaloblastic Anemia · Pathology

Where is the primary site of Vitamin B12 absorption in the gastrointestinal tract?

  1. Duodenum
  2. Jejunum
  3. Terminal ileum
  4. Ascending colon
Show answer and explanation

Correct answer: Terminal ileum

After binding to Intrinsic Factor (IF) in the stomach and duodenum, the B12-IF complex travels to the terminal ileum. Here, specialized receptors facilitate the absorption of the complex into the bloodstream.

Difficulty: Medium Question 6 of 20

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