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Digestive System Exercise

1. Which of the following is not part of the accessory organs in the digestive system?
a) liver
b) pancreas
c) large intestines
d) sublingual salivary gland

2. The structure of the alimentary canal wall has 4 layers, from deep to superficial, they are
a) mucosa, submucosa, serosa, muscularis layer
b) mucosa, submucosa, muscularis layer, serosa
c) mucosa, muscularis layer, submucosa, serosa
d) mucosa, serosa, muscularis layer, submucosa

3. The mouth is adapted to take in food from the external environment and to begin preparing it for
a) absorption
b) secretion
c) reabsorption
d) digestion

4. What is the function of the soft palate?
a) to keep opening to nasal cavity open at all times
b) to keep opening to nasal cavity open during swallowing
c) to keep opening to nasal cavity closed during swallowing
d) to keep opening nasal cavity closed at all times

5. There are _______ deciduous teeth and _________ permanent teeth.
a) 20, 30
b) 20, 32
c) 18, 30
d) 18, 32

6. Which of the following is not a function of salivary glands?
a) start digestion of proteins
b) helps bind food particles
c) secrete saliva
d) makes taste possible

7. What are the names of the 3 salivary glands?
a) parotid glands, submandibular glands, submaxillary glands
b) parotid glands, submandibular glands, sublaryngeal glands
c) parotid glands, submandibular glands, sublingual glands
d) parotid glands, submandibular glands, subpharygneal glands

8. Which of the following is not a function of the stomach?
a) receives food
b) mixes food with gastric juice
c) carries out limited amount of absorption
d) moves food into the large intestine

9. The sphincter that serves as a valve between the stomach and small intestine is
a) cardiac sphincter
b) pyloric sphincter
c) glossopharygeal sphincter
d) intestinal sphincter

10. The regulation of gastric secretion is enhanced by
a) stimulation of parasympathetic nervous system and the hormone gastrin
b) stimulation of the sympathetic nervous system and the hormone gastrin
c) inhibition of the parasympathetic nervous system and the hormone gastrin
d) inhibition of the sympathetic nervous system and the hormone secretin

11. The presence of food in the small intestine
a) increase gastric secretion
b) inhibit gastric secretion
c) has no effect on gastric secretion

12. Pancreatic juice contains enzymes that can split
a) carbohydrates, proteins, fats, minerals
b) carbohydrates, proteins, fats, nucleic acids
c) proteins, fats, nucleic acid, water
d) proteins, fats, nucleic acid, vitamins

13. The names of the 2 hormones that influence pancreatic secretion are
a) secretin, cholecystokinin
b) secretin, renin
c) aldosterone, cholecystokinin
d) vasopressin, cholecystokinin

14. The function of the liver is to
a) metabolize carbohydrates, lipids and proteins
b) filtration of blood
c) detoxification of chemicals
d) all of the above

15. Bile is just one of the liver's many secretions that directly influence digestion.
a) this statement is true
b) this statement is false

16. The components of bile include: bile salts, bile pigments, cholesterol and various electrolytes. Which of the components in bile have digestive functions?
a) bile salts
b) bile pigments
c) cholesterol
d) all of the above

17. Which of the following is not a function of the small intestines?
a) receives secretions from the pancreas and liver
b) completes digestion of nutrients
c) absorbs products of digestion
d) transports the residue to the anal canal

18. The parts of the small intestine (start with the part closest to the stomach) are
a) duodenum, jejunum, ileum
b) duodenum, ileum, jejunum
c) ileum, jejunum, duodenum
d) ileum, duodenum, jejunum

19. Which of the following statement is false regarding absorption in the small intestines?
a) villi increase the surface area of the intestinal wall to increase absorption
b) monosaccharides, amino acids, fatty acids and glycerol can be absorbed by the villi
c) fat molecules enter from the lacteals of the villi
d) all of the above is true

20. Which of the following statement is false regarding the function of the large intestines?
a) the only important secretion is mucous
b) feces are formed and stored here
c) main absorption is water and electrolytes
d) digestive activity remain high in the large intestines

21. Which of the following is not a source of carbohydrates?
a) starch
b) amino acids
c) glycogen
d) disaccharides

22. Which of the following concerning lipids is false?
a) lipids are organic compounds that supply energy
b) lipids are used to build cell structures
c) all lipids contain fat-soluble vitamins
d) metabolism of triglycerides is controlled predominately by liver and adipose tissues

23. Some of the functions of proteins include
a) serves as structural material and act as enzymes
b) provide energy
c) a and b
d) none of the above

24. The digestive enzyme pepsin secreted by gastric glands begins the digestion of
a) carbohydrates
b) protein
c) fat

25. Which of the following enzymes is present in secretions of the mouth, stomach, and pancreas?
a) amylase
b) trypsin
c) lipase
d) lactase

26. Carbohydrates are ingested in such foods as
a) meat and seafoods
b) bread and pasta
c) butter and margarine

27. Glucose can be stored as glycogen in the
a) blood plasma
b) connective tissue
c) liver

28. Carbohydrates are acted on by
a) peptidases, trypsin and chymotrypsin
b) amylase, maltase and sucrase
c) lipases
d) peptidases, lipases and galactase

29. The parasympathetic nervous system influences digestion by
a) relaxing smooth muscles
b) stimulating peristalsis and secretatory activity
c) constricting sphincters
d) none of these

30. The digestive juice product containing enzymes capable of digesting all 4 major foodstuff categories is
a) pancreatic
b) gastric
c) salivary
d) biliary

31. The site of production of cholecystokinin is
a) the stomach
b) the small intestine
c) the pancreas
d) the large intestine

32. Which of the following is not a characteristic of the large intestine?
a) it is divided into ascending, transverse, and descending portions
b) it contains abundant bacteria, some of which synthesize certain vitamins
c) is the main absorptive site
d) it absorbs much of the water and salts remaining in the wastes

33. The gallbladder
a) produces bile
b) is attached to the pancreas
c) stores and concentrates bile
d) produces secretin


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