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






2. Where mechanical and chemical digestion of food begins






3. Secretes two substances: intrinsic factor and hydrchloric acid






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






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






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






7. Secreted from intestinal mucos for digestion of lactose






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






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






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






11. 1.5m long -functions in the absorption of salts and the absorption of any water not already absorbed by the small intestine






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






13. Produces enzymes such as amylase - trypsin - lipase






14. Produced by the pancreas for fat digestion






15. Vessels of the lymphatic system






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






17. Enzyme in saliva which hydrolyzes starch to maltose






18. To grind the food






19. Lacking lactase enzyme






20. Place to store food






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






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






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






24. Line the gastrovascular cavity secrete enzymes into the cavity






25. Uses intracellular and extracellular digestion






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






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






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






29. Converted to pepsin and synthesized by chief cells






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






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






32. Biting and chewing action of teeth






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






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






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






36. Secreted from the intestinal mucosa for polypeptide digestion






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






38. Produced by the pancreas for protein digestion






39. Produced by the pancreas to digest carbohydrates






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






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






42. Secreted from the intestinal mucosa for fat digestion






43. Unable to synthesize their own nutrients






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






45. 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






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






47. Improve food digestion






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






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






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