Digestive System Review - Mercer Island School District

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.
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
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.
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?