Name_______________________________Date________________Period________ Digestive System Review For questions 1-14, label the parts of the digestive system. 1. _____________________________ 2. _____________________________ 3. _____________________________ 4. _____________________________ 5. _____________________________ 6. _____________________________ 7. ____________________________ 8. _____________________________ 9. _____________________________ 10. _____________________________ 11. _____________________________ 12. _____________________________ 13. _____________________________ 14. _____________________________ For questions 15-20, complete the table by checking the correct column(s). More than one box may be checked. Description CarboFats hydrate Protein Most energy rich nutrient Sugars, starches and cellulose Broken down into amino acids Part of a balance diet Normally used for body building but can also be used for energy Body’s preferred energy source 21. In what organ does digestion begin? What enzyme is involved? What macromolecule is chemically digested? 22. In what organ are proteins first digested? Which enzyme is involved? 23. Into which organ does food pass into after it leaves the stomach? What occurs there? 24. What role does the liver play in the digestive system? 25. Explain the contribution of the pancreas to the process of digestion. 26. What is the function of the large intestine? 27. Compare and contrast pepsin and trypsin. 28. What are villi? How do they enhance the rate of nutrient absorption? For questions 29-35, complete the table by checking the correct column(s). More than one box can be checked for each function. Function Small Intestine Large Intestine Water is absorbed through the walls Digestion is essentially completed Vitamin K is produced by bacteria Contents are moved by peristalsis Indigestible material is collected Bile and pancreatic juices are added 36. Many people have their gallbladder removed, but the absence of the gallbladder has little effect on their digestion. Explain why this is so. 37. How might the pancreas’s production of sodium hydrogen carbonate be considered part of a negative feedback mechanism? 38. Give 2 examples of mechanical digestion. What is the function of mechanical digestion, since it does not chemically digest macromolecules. 39. Once absorbed by the villi, what happens to: a. monosaccharides and amino acids? b. lipids molecules?