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

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

3. Unable to synthesize their own nutrients

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

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

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

7. Contains a typholosole to provide increased surface area for digestiona nd absorption

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

9. Secreted from intestinal mucos for digestion of lactose

10. Produced by the pancreas for protein digestion

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

12. Place to store food

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

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

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

16. Provides for transient storage of feces before elimination through the anus

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

18. Secretion of the parietal cells that facilitates the absorption of vitamin b12 across the intestinal lining

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

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

21. Line the gastrovascular cavity secrete enzymes into the cavity

22. 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

23. Secreted from the intestinal mucosa for polypeptide digestion

24. Vessels of the lymphatic system

25. Begins with oral cavity and continues with the pharynx - the esophagus - stomach - small inestine - large intestive - then anus

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

27. Uses intracellular and extracellular digestion

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

29. Where mechanical and chemical digestion of food begins

30. 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

31. Produces enzymes such as amylase - trypsin - lipase

32. Restin pressures of the lower esophageal sphincter normally range from 15-35mmHg above gastric baseline pressure

33. Bring food to the mouth (ingestion) and release the particles intoa cup-like sac

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

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

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

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

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

39. Produced by the pancreas for fat digestion

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

41. 1.5m long -functions in the absorption of salts and the absorption of any water not already absorbed by the small intestine

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

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

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

45. Secreted from the intestinal mucosa for fat digestion

46. Produced by the pancreas to digest carbohydrates

47. Enzyme in saliva which hydrolyzes starch to maltose

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

49. Lubricates food to facilitate swallowing and provides a solvent for food particles =secreted in response toa nervous reflex triggered by the presence of food in the oral cavity

50. Produces bile in the gall bladder before release into the small intestine