Multiple choice

Which of the following are NOT absorbed by the villi?

  1. Fatty acids

  2. Proteins

  3. Mineral ions

  4. Vitamins

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Villi absorb monomers and small molecules such as amino acids, fatty acids, mineral ions, and vitamins. Large macromolecules like intact proteins cannot be absorbed by the villi and must first be digested into amino acids.