Question

which of the following statements about nutrient absorption is true?
a absorption is the process of breaking food down into smaller components.
b all nutrients are absorbed into the blood, except fiber, which is absorbed into the lymphatic system.
c the large surface area of the small intestines facilitates nutrient absorption.
d proteins are absorbed whole.

Explanation:

• Option A: Absorption is not the process of breaking food down into smaller components. That is digestion.
• Option B: All nutrients (except fiber) are absorbed into the blood or lymphatic system. Fat - soluble vitamins and large fats are absorbed into the lymphatic system, while water - soluble nutrients are absorbed into the blood.
• Option C: The large surface area of the small intestines (due to villi and micro - villi) does facilitate nutrient absorption.
• Option D: Proteins are broken down into amino acids (or di - and tri - peptides) before absorption, not absorbed whole.

Answer:

C. The large surface area of the small intestines facilitates nutrient absorption.