QuestionSBA
QuestionChoice
This is incorrect as the kidney plays no part in the absorption of vitamin B12, the molecule that intrinsic factor binds to. This complex is absorbed in the terminal ileum.
10023508
d
Kidney
QuestionChoice
The molecule that intrinsic factor binds to is vitamin B12. Vitamin B12 needs intrinsic factor to bind to it so it can be absorbed in the terminal ileum.
10023505
a
Terminal ileum
QuestionChoice
This is where gastric parietal cells secrete intrinsic factor, not where vitamin B12 (which binds to intrinsic factor) is absorbed in the body.
10023506
b
Stomach
QuestionChoice
Vitamin B12 is the molecule that is bound to intrinsic factor and is absorbed in the terminal ileum. The liver plays no role in the absorption of vitamin B12.
10023507
c
Liver
QuestionChoice
This is incorrect as the jejunum absorbs vitamins A, D, E, and K. It does not absorb vitamin B12 which is what intrinsic factor binds to. Vitamin B12 is absorbed in the terminal ileum.
10023509
e
Jejunum
Concept
Chapter
2693
5682
Intrinsic factor
Topic
149
Gastro-intestinal physiology
17099
A 48-year-old woman presents to her GP with lethargy. After ruling out lack of sleep, the GP decides to do some blood tests. The results show that she has autoantibodies against intrinsic factor.

Where in the body is the molecule that intrinsic factor binds to absorbed?
a