Question

multiple choice question
what substance is necessary for the body to absorb vitamin b - 12?
o intrinsic factor
o lymph
o insulin
o bicarbonate

Explanation:

The intrinsic factor, produced by parietal cells in the stomach, binds to vitamin B - 12 in the small intestine and enables its absorption. Lymph is part of the immune system, insulin regulates blood - glucose levels, and bicarbonate helps with acid - base balance and digestion but none are related to vitamin B - 12 absorption.

Answer:

A. Intrinsic factor