Intrinsic factor is
A)secreted by the parietal cells in the stomach
B)necessary for absorption of vitamin B12
C)abundant in pernicious anemia
D)both a and b
E)both b and c

Question

Quizplus · Accepted Answer

Intrinsic factor is a protein that is secreted by the parietal cells in the stomach and is necessary for the absorption of vitamin B12. Without intrinsic factor, vitamin B12 cannot be absorbed by the small intestine and can lead to pernicious anemia. Therefore, both options A and B are correct. Option C is not entirely correct, as intrinsic factor deficiency is associated with pernicious anemia, but it is not necessarily abundant in this condition.

Intrinsic Factor Is