Digestive Physiology Study Questions 18 PDF

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Digestive Physiology Study Questions (select the single BEST answer)

1. Digestion makes larger molecules from smaller molecules. A) true B) false

2. The conditions within the lumen of the digestive tract can be too harsh for the rest of the body. A) true B) false

3. Which of the following is matched with its unit that can be absorbed (or absorbable unit)? A) protein – fatty acid B) carbohydrate – monoglyceride C) fat – monosaccharide D) protein – amino acid E) carbohydrate – amino acid

4. The enteric nervous system includes the A) myenteric plexus B) submucosal (or submucous) plexus C) both A and B D) neither A nor B

5.Which of the following is an accessory digestive gland? A) pancreas B) salivary gland C)liver D)Aand B E)A,B,and C

7.It ________ possible for a person to swallow food while standing on their head (or upside down). A) is B) is not

9.Saliva contains a carbohydrate digesting enzyme. A) true B) false

10. Heartburn occurs when ________ contents move into the __________. A) stomach, esophagus B) esophagus, stomach C) stomach, duodenum D) duodenum, stomach

12. Parietal cells secrete A) amylase B) pepsinogen C) chymotrypsin D) HCl E) Band D

14. Intrinsic factor is A) needed for enzyme activation B) an enzyme C) needed for absorption of all vitamins D) needed for absorption of vitamin B12 E) none of these

15. All of the following decrease stomach emptying EXCEPT A) increased enterogasterones B) increased fats in the duodenum C) increased distension of the duodenum D) increased distension of the stomach 16. Which of the following enters the lumen of the small intestine? A) gastric contents B) pancreas exocrine secretions C) bile D) A and C E) A, B, and C

17. Enterokinase (or enteropeptidase) which activates trypsinogen is A) secreted from the pancreas B) secreted from cells in the stomach C) located on intestinal mucosal cells (epithelial cells) D) in saliva E) none of these

18. Increased fatty acids in the duodenum causes __________ secretion of CCK, which causes ________ of the gall bladder. A) increased, contraction B) increased, relaxation C) decreased, relaxation D) decreased, contraction

19. The pancreas secretes A) amylase B) trypsinogen C) both A and B D) neither A nor B

20. Bile salts are absorbed from the small intestine and can then be secreted again by the liver. A) true B) false

21. Bile salts A) are enzymes B) help in absorption of the products of fat digestion by Increasing the surface area of lipid droplets C) both A and B D) neither A nor B

22. Which of the following contributes to the large surface area for absorption in the small

intestine? A) microvilli B) villi C) both A and B D) neither A nor B

23. Which of the following does not go directly to the liver after absorption from the digestive tract, but instead enters the lymph. A) fats B) monosaccharides C) amino acids D)allofthese E)Aand B

24. In which part of the GI tact below does most of the digestion of food molecules occur? (Carbohydrate, fat, and protein digestion is completed here.) A) mouth B) stomach C) small intestine D) large intestine

25. Bacteria in the large intestine produce vitamin K. A) true B) false

26. The contents of the GI tract (within the lumen of the GI tract) are not considered to be within the internal environment of the body. A) true B) false

27. Saliva contains A) amylase B) mucus C) both A and B D) neither A nor B

29. Which stomach secretion is NOT matched with its function (or one of its functions)? A) mucus – forms a protective layer B) intrinsic factor – vitamin B12 absorption C) HCl – kills microorganisms D) pepsinogen – carbohydrate digestion

31. Segmentation and the migrating motility complex occur in the _________________. Haustral contractions and mass movements occur in the _________________. A) stomach, small intestine B) small intestine, stomach C) large intestine, stomach D) small intestine, large intestine

33. Fats are broken down into _______________ which can then be absorbed from the digestive tract. A) monoglycerides B) monoglycerides and fatty acids C) fatty acids D) amino acids E) monosaccharides and fatty acids

36. Heartburn can occur when gastric contents move (or splash) into the esophagus. A) true B) false

37. Which of the following is NOT matched with a correct description? A) HCl (hydrochloric acid) -secreted by parietal cells B) pepsinogen -secreted by chief cells C) gastrin enzyme secreted by cells in the fundus of the stomach D) intrinsic factor -needed for vitamin B12 absorption E) intrinsic factor -secreted by parietal cells

39. Which below is secreted in an inactive form to protect enzyme secreting cells? A) carbohydrate digesting enzyme B) fat digesting enzyme C) protein digesting enzyme

40. The enterogastrones A) are hormones B) are secreted by the small intestine C) include CCK (cholecystokinin) and secretin D) A and B E) A, B, and C

41. Which of the following decreases stomach emptying? A) distension of the duodenum B) increased fat in the duodenum C) both A and B D) neither A nor B

42. Which of the following is an enzyme located on the cell membrane of the small intestine mucosal (epithelial) cells that activates trypsinogen? A) chymotrypsin B) trypsin C) enterokinase D) carboxypeptidase E) pepsin

43. The exocrine pancreas secretes A) enzymes B) an alkaline (bicarbonate) solution C) both A and B D) neither A nor B

44. Bile is synthesized (made) in the A) pancreas B) liver C) small intestine

D) gall bladder E) large intestine

45. Digestion of which below is completed in the small intestine? (Hint: This means food molecules are broken down completely into absorbable units here.) A) fats B) proteins C) carbohydrates D) B and C E) A, B, and C

46. Hepatic portal circulation allows nutrients to go directly to the liver after they are absorbed from the GI tract, except for __________, since they cannot directly enter the blood. A) amino acids B) monosaccharides C) fats D) amino acids and monosaccharides E) fats and monosaccharides

47. The large intestine secretes A) mucus B) enzymes C) both A and B D) neither A nor B

48. Which of the following is not part of the digestive tract (GI tract), but is an accessory digestive organ of the digestive system? A) duodenum B) colon C) pharynx D) pancreas E) esophagus

49. Which of the following is matched with its molecule (or unit) that can be absorbed (absorbable unit)? A) carbohydrates -monosaccharide B) proteins -monoglyceride C) proteins -fatty acid D) fats -amino acid E) carbohydrate -monoglyceride

50. Which of the following is the innermost layer of the digestive tract (nearest the lumen)? A) serosa B) muscle layer C) submucosa D) mucosa

52. Which of the following is needed or is primarily responsible for getting a bolus of food in the esophagus to the stomach? A) gravity B) peristalsis

53. All of the following are secreted by cells in the stomach EXCEPT A) intrinsic factor B) gastrin C) amylase D) hydrochloric acid E) mucus

56. Bile salts A) help in the absorption of the products of fat digestion by forming micelles B) prolong (decrease the rate of) fat digestion C) decrease the surface area for lipase to act D) are enzymes E) prolong (decrease the rate of) fat absorption

57. Bile salts ________ be reused (or recycled) because they ________ be absorbed from the small intestine. A) can, can B) cannot, cannot

58. Carbohydrate digestion is completed (just finished) within the A) mouth B) stomach C) small intestine D) large intestine E) esophagus

60. About 8 liters of fluid goes into (by ingestion and secretion into) the GI tract per day. Most of this volume is absorbed into the blood in which part of the digestive system? A) stomach B) large intestine C) small intestine D) large and small intestine (about the same volume is absorbed in each)

63. A monoglyceride would be produced from digestion of which of the following food molecules? A) protein B) carbohydrate C) fat D) fat and carbohydrate

66. Chief cells secrete A) pepsin B) pepsinogen C) HCl (hydrochloric acid) D) intrinsic factor E) C and D

67. The mucus secreted by cells in the stomach A) forms a protective coating or layer on the inner surface of the stomach B) is alkaline C) both A and B

68. Increased fat (fat molecules) in the duodenum __________ stomach emptying. A) increases B) decreases C) does not affect

69. Which of the following is NOT a pancreatic exocrine secretion (is NOT a secretion of the exocrine part of the pancreas)? A) lipase B) insulin C) amylase D) a bicarbonate solution E) trypsinogen

70. Bile is synthesized in the _________ and stored and concentrated in the _________. A) gall bladder, pancreas B) gall bladder, liver C) pancreas, gall bladder D) liver, gall bladder E) liver, pancreas

71. Which of the following is FALSE about bile salts? A) bile salts increase the surface area for lipase to act B) bile salts help maintain a lipid emulsion C) bile salts assist in the absorption of the products of fat digestion D) bile salts are recycled (are absorbed from the small intestine and can be resecreted) E) bile salts are enzymes

72. Protein digestion is completed (just finished) within the A) mouth B) stomach C) large intestine D) small intestine E) esophagus

74. Which of the choices is best described by the following statement? It is the small intestine movement that acts as a "good housekeeper" and sweeps undigested remnants (undigested material) and bacteria in the small intestine into the large intestine. A) segmentation B) haustral contractions C) mass movements D) migrating motility complex

Answers to the Digestive Physiology Study Questions are below

1-B 2-A 3-D 4-C

5-E 6-B 7-A 8-C 9-A 10-A 11-C 12-D 13-A 14-D 15-D 16-E 17-C 18-A 19-C 20-A 21-B

22-C 23-A 24-C 25-A 26-A 27-C 28-A 29-D 30-C 31-D 32-C 33-B 34-A

35-D 36-A 37-C 38-C 39-C 40-E 41-C 42-C

43-C 44-B 45-E 46-C 47-A 48-D 49-A 50-D 51-E 52-B 53-C 54-C 55-A 56-A 57-A 58-C 59-D 60-C 61-B 62-C 63-C

64-D 65-A 66-B 67-C 68-B 69-B 70-D 71-E 72-D 73-A 74-D

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