Small intestine major function of the intestines What are the functions of intestinal motility? How is intestinal motility controlled? 1) Intrinsic nerves 2) Extrinsic nerves What are intestinal cells and what do they do? 3) crypt cells DIGESTION AND ABSORPTION What happens with digestion? Carbohydrates Proteins Fats Nucleic acids (DNA, RNA) What are the five major digestive secretions of the GI tract? 1) saliva 2) gastric juice 3) pancreatic juice 4) bile 5) intestinal juice Where does absorption of nutrients occur (besides the small intestine)? 1) under the tongue 2) from the stomach 3) from the large intestine. A. How are carbohydrates digested and absorbed?