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PCAT Biology Digestion

Subjects : pcat, biology
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Begins with oral cavity and continues with the pharynx - the esophagus - stomach - small inestine - large intestive - then anus

2. Synthesized and stored in the S cells of the upper intestine -stimulates the secretion of bicarbonate-containing substances from the pancreas and inhibits gastric emptying and gastric acid production

3. Lacking lactase enzyme

4. Produces enzymes such as amylase - trypsin - lipase

5. The breakdown of large food particles into smaller particles through mastication

6. Converted to pepsin and synthesized by chief cells

7. Enzymes are secreted - hydrolyzing complex nutrients into simpler molecules - which are then absorbed

8. Refers to a digestive process that occurs outside of the cell - within a lumen or tract

9. Enzymes are secreted to digest the fly and absorb the soluble end products

10. Uses intracellular and extracellular digestion

11. Secreted from the intestinal mucosa for fat digestion

12. Secreted by the stomach that is a protein-hydrloyzing enzyme - and hydrochloric acd - which kills bacteria - dissolves the intercellular 'glue' holding food tissues together - and activates certain proteins

13. Produced by the pancreas for fat digestion

14. Food is moved down the esophagus by this rhythmic waves of involuntary muscular contraction

15. Degradation of large molecules into smaller molecules that can be absorbed into the bloodstream and used directly by cells

16. Decreased lower esophageal sphincter pressure is not always associated with the development of GERD; however - the majority of patients

17. Refers to the enzymatic breakdown of macromolecules into smaller molecules and begins in the mouth when the salivary glands secrete saliva

18. Secreted from intestinal mucos for digestion of lactose

19. Secretes two substances: intrinsic factor and hydrchloric acid

20. Secreted by the glands of the stomach which protects the stomach lining from the harshly acidic juices present in the stomach

21. Can occur after spontaneous transient lower esophageal sphincter relaxations not associated with swallowing

22. Accomplished by enzymatic hydrolysis -nutrients pass through the semipermeable plasma membrane of the gut cells to be further metabolized or transported

23. Occurs within the cell - usually in membrane-bound vesicles

24. Fuse with the food vacuole and release their digestive enzymes that act upon the nutrients

25. Finger like projections that extend out of the intestinal wall -contain capillaries and lacteals

26. Biting and chewing action of teeth

27. Large particles of food into small particles begins by cutting and grinding in the mouth and churning in the digestive tract

28. Completes chemical digestion -divided into three section: duodenum - jejunum - and the ileum -highly adapted to absorption

29. Emulsifies fats - breaking down large globules into small droplets (contains no enzymes)

30. Stimulates the parietal cells to produce a substance (HCl) that denatures proteins and activates digestive enzymes

31. Pseudopods surround and engulf food and enclose it in food vacuoles

32. When nutrients are required for plants - the storage polymers are broken down to simpler molecules by enzyme hydrolysis

33. Produced by the pancreas to digest carbohydrates

34. Where mechanical and chemical digestion of food begins

35. The muscular tube leading from the mouth to the stomach

36. Line the gastrovascular cavity secrete enzymes into the cavity

37. Enzyme in saliva which hydrolyzes starch to maltose

38. (Insects) have a digestive system similar to that of the earthworm

39. A typical saprophyte that lives on dead organic material - that secrete enzymes into the external environment (on bread)

40. 1.5m long -functions in the absorption of salts and the absorption of any water not already absorbed by the small intestine

41. Vessels of the lymphatic system

42. Produced and stored in the I cells of the duodenal and jejunal mucosa

43. Have one way digestive tract with both a mouth and an anus

44. An acidic - semifluid mixture of partially digested food produced from the churning of the stomach

45. Secreted from intestinal mucosa for digestion of maltose - lactose - sucrose

46. Produced by the pancreas for protein digestion

47. Improve food digestion

48. Place to store food

49. A large - muscular organ located in the upper abdomen - stores and partially digests food

50. Patients usually have a decreased lower esophageal reflux pressure - leading to an increased passage of stomach contents into the esophagus