The intrinsic factor–B12 complex is absorbed in which part of the digestive tract?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $9.99Unlock all

Prepare for the ASPEN Certified Nutrition Support Clinician (CNSC) Exam. Study with structured quizzes and detailed insights to enhance your knowledge and readiness. Get set for success!

Multiple Choice

The intrinsic factor–B12 complex is absorbed in which part of the digestive tract?

Explanation:
The key idea is that vitamin B12 absorption requires intrinsic factor and occurs in the terminal part of the small intestine. After intrinsic factor binds B12 in the stomach, the complex travels to the ileum, where specific receptors on enterocytes recognize it and mediate uptake. Absorption does not occur in the stomach, colon, or esophagus. Therefore, the intrinsic factor–B12 complex is absorbed in the small bowel, specifically the terminal ileum.

The key idea is that vitamin B12 absorption requires intrinsic factor and occurs in the terminal part of the small intestine. After intrinsic factor binds B12 in the stomach, the complex travels to the ileum, where specific receptors on enterocytes recognize it and mediate uptake. Absorption does not occur in the stomach, colon, or esophagus. Therefore, the intrinsic factor–B12 complex is absorbed in the small bowel, specifically the terminal ileum.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy