Which is true regarding the absorption of nutrients during digestion?
A) Proteins are chemically digested to amino acids and absorbed into the blood of capillaries in the small intestine.
B) Carbohydrates are chemically digested to monosaccharides and were also absorbed into the blood of capillaries in the stomach.
C) Lipids are chemically digested to fatty acids and glycerides, and were absorbed into the lacteals in the large intestinal villi.
D) Fat-soluble vitamins (A, D, E, and K) are absorbed along with the products of protein digestion.

Question

Quizplus · Accepted Answer

The proteins are chemically digested to amino acids and were absorbed into the blood of capillaries in the small intestine. The carbohydrates are chemically digested to monosaccharides and were also absorbed into the blood of capillaries in the small intestine. The lipids are chemically digested to fatty acids and glycerides, and were absorbed into the lacteals in the small intestinal villi. Fat-soluble vitamins (A, D, E, and K) are absorbed along with the products of lipid digestion, so they must be ingested with fats in order to be absorbed. On the other hand, water-soluble vitamins (the B complex, and C) are absorbed by simple diffusion. Vitamin B₁₂ is an exception. It must first bind to intrinsic factor in the stomach and then be endocytosed by cells of the ileum for absorption. Minerals are electrolytes that are absorbed along the length of the small intestine, and some, like sodium and chloride, can also be absorbed in the large intestine. Sodium is absorbed with sugars and amino acids. Chloride ions are mostly absorbed by active transport in the ileum. Potassium is absorbed by simple diffusion once water has been absorbed.

Which Is True Regarding the Absorption of Nutrients During Digestion