Which water-soluble vitamin cannot be absorbed by the intestinal mucosa unless it has been bound to intrinsic factor?
A) vitamin B₁₂
B) vitamin C
C) vitamin B₆
D) vitamin D
E) vitamin K

Question

Quizplus · Accepted Answer

Vitamin B₁₂ cannot be absorbed by the intestinal mucosa unless it has been bound to intrinsic factor, which is a glycoprotein secreted by the parietal cells of the stomach. Without intrinsic factor, Vitamin B₁₂ is excreted in the feces.

Which Water-Soluble Vitamin Cannot Be Absorbed by the Intestinal Mucosa