Fill in the Blank QuestionFill in the blank question.Intrinsic factor from the parietal cells assists in vitamin absorption in the of the small intestine.

Fill in the Blank

Intrinsic factor from the parietal cells assists in vitamin B12 absorption in the ileum of the small intestine.

Explanation

Intrinsic factor is a glycoprotein produced by parietal cells located in the gastric mucosa. Its primary role is to facilitate the absorption of vitamin B12, which is essential for various bodily functions including red blood cell formation and neurological health. The ileum, which is the final section of the small intestine, is specifically designed for the absorption of nutrients, including vitamin B12 when it is bound to intrinsic factor. This binding is crucial because B12 cannot be absorbed efficiently in its free form. Without intrinsic factor, individuals may develop deficiencies leading to serious health issues, such as pernicious anemia. Therefore, the function of intrinsic factor is critical for ensuring that the body acquires adequate levels of this vital vitamin.