SparkNotes: Digestion: Review Test

1. The digestive tract includes...

(A) the mouth

(B) the larynx

(C) the spleen

(D) only one salivary gland

2. Accessory organs are

(A) Not important in digestion.

(B) Always paired.

(C) Always unpaired.

(D) Connected to the main digestive tract via ducts.

3. The three true layers of the gastrointestinal tract include all of the following except the

(A) Mucosa

(B) Submucosa

(C) Muscularis externa

(D) Serosa

4. The mucosa of the gastrointestinal tract is composed of cells arranged in

(A) Single layers in the mouth.

(B) Multiple layers in the esophagus.

(C) Multiple layers in the colon.

5. The submucosa contains all of the following except

(A) Lymphatics /WRONGWRONG Blood vessels

(B) Muscle

(C) Connective tissue

6. The muscularis externa...

(A) Has two layers of muscle: an outer longitudinal and an inner circular.

(B) Has two layers of muscle: an inner longitudinal and an outer circular.

(C) Is the third true layer of the gastrointestinal tract.

(D) Has only mass movements during peristalsis.

7. Serosa rigidly fixes the digestive tract organs to the abdominal wall.

(A) True

(B) False

8. Saliva...

(A) Contains salivary amylase.

(B) Is produced by the mouth.

(C) Digests proteins.

(D) Digests fats.

9. The pharynx...

(A) Is where the first phase of swallowing occurs.

(B) Has the same function as the larynx.

(C) Is where the second phase of swallowing occurs.

(D) Allows food to pass directly into the stomach.

10. The stomach...

(A) Is responsible only for chemical digestion.

(B) Is responsible for chemical and mechanical digestion.

(C) Is where digestion starts.

(D) Is where food is stored.

11. The small intestine...

(A) Is responsible only for a small part of digestion.

(B) Is where mechanical digestion occurs.

(C) Has a brush border membrane.

(D) Has two parts.

12. The three portions of the small intestine include all of the following except

(A) Jejunum

(B) Duodenum

(C) Ileum

(D) Cecum

13. The pancreas produces

(A) Bile

(B) Salivary amylase

(C) Chyme

(D) Lipase

14. Nutrients are preferentially absorbed throughout the small intestine.

(A) True

(B) False

15. The colon contains all of the following except

(A) Cecum

(B) Anus

(C) Ascending and descending portions.

(D) Rectum

16. Salivary glands are...

(A) Sometimes paired.

(B) Important in digestion.

(C) Are not connected to the gastrointestinal tract.

(D) Produce salivary lipase.

17. The pancreas...

(A) Has two important functions, both of which are crucial to digestion.

(B) Produces only enzymes.

(C) Produces bicarbonate.

(D) Is a paired accessory organ.

18. The gall bladder...

(A) Makes bile.

(B) Stores bile.

(C) Makes bicarbonate.

(D) Drains into the blood stream.

19. The stages of digestion include all of the following except

(A) Secretion

(B) Absorption

(C) Elimination

(D) Regurgitation

20. The gastrointestinal tract...

(A) Is in a constant state of motion.

(B) Only moves in one direction.

(C) Is moved only by nerve inputs.

(D) Is in a fixed position.

21. Secretion...

(A) Is the transport of materials into the blood stream.

(B) Occurs after degradation.

(C) Is responsible for transporting enzymes only.

(D) Is the transport of materials into the lumen of the intestine.

22. Degradation...

(A) Begins in the mouth.

(B) Occurs in the esophagus.

(C) Occurs in the pharynx.

(D) Has three phases.

23. Which enzyme is matched up with the proper function?

(A) Lipase breaks down fats.

(B) Amylase breaks down protein.

(C) Acid breaks down carbohydrates.

(D) Chyme breaks down all of the above.

24. Absorption is...

(A) The first stage of digestion is

(B) the process whereby nutrients are transported into the blood stream.

(C) occurs in only one method.

(D) Occurs only at the brush border membrane.

25. Active and passive transport are the same except that they carry different nutrients across the membrane.

(A) True

(B) False

26. Micelles...

(A) Are made in the gall bladder.

(B) Help transport proteins.

(C) Require active transport.

(D) Are important for fat absorption.

27. Diffusion...

(A) Occurs via an electrochemical gradient.

(B) Requires an energy source.

(C) Is not the method by which water is transported.

(D) Is only used in the colon.

28. Absorption can take place in the...

(A) Esophagus

(B) Pharynx

(C) Mouth

(D) Anus