Question

3 — absorption
learning objective: define the functions of the digestive tract that facilitate nutrient absorption
vitamin b12 is absorbed in which section of the small intestine?
a.) ileum
b.) duodenum
c.) colon
d.) jejunum

Explanation:

Vitamin B12, along with bile salts, is absorbed in the ileum (the last part of the small intestine). The duodenum is the first part (involved in digestion), the jejunum is the middle part (absorbs many nutrients but not B12), and the colon is part of the large intestine (not small intestine, absorbs water/electrolytes). So the correct section of the small intestine for B12 absorption is the ileum.

Answer:

a.) Ileum