Intrinsic factor aids the absorption of ________ across the intestinal lining.
A) vitamin C
B) vitamin B₁₂
C) vitamin D
D) vitamin K
E) vitamin B₅

Question

Quizplus · Accepted Answer

Intrinsic factor is a glycoprotein secreted by the parietal cells of the stomach that binds to vitamin B₁₂ and facilitates its absorption across the intestinal lining. Vitamin B₁₂ is essential for the production of DNA and red blood cells and plays a crucial role in the nervous system. Deficiency in vitamin B₁₂ can lead to pernicious anemia and neurological damage. Vitamin C is absorbed in the small intestine through passive diffusion, while vitamins D and K are absorbed in the upper small intestine with the help of bile acids. Vitamin B₅ is also absorbed in the upper small intestine through passive diffusion.

Intrinsic Factor Aids the Absorption of ________ Across the Intestinal