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PCAT Biology Digestion

Subjects : pcat, biology
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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






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






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






4. Converted to pepsin and synthesized by chief cells






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






6. Where mechanical and chemical digestion of food begins






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






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






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






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






11. Place to store food






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






13. Biting and chewing action of teeth






14. 1.5m long -functions in the absorption of salts and the absorption of any water not already absorbed by the small intestine






15. Produced by the pancreas to digest carbohydrates






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






17. Produces enzymes such as amylase - trypsin - lipase






18. Secreted from intestinal mucos for digestion of lactose






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






20. Secretes two substances: intrinsic factor and hydrchloric acid






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






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






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






24. 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






25. Produced by the pancreas for protein digestion






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






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






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






29. 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






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






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






32. Line the gastrovascular cavity secrete enzymes into the cavity






33. Secreted from the intestinal mucosa for polypeptide digestion






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






35. Enzyme in saliva which hydrolyzes starch to maltose






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






37. Lacking lactase enzyme






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






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






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






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






42. Unable to synthesize their own nutrients






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






44. Produced by the pancreas for fat digestion






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






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






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






48. 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






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






50. Secreted from the intestinal mucosa for fat digestion