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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. Secreted from the intestinal mucosa for fat digestion






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






3. Vessels of the lymphatic system






4. 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






5. Secreted from the intestinal mucosa for polypeptide digestion






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






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






8. Secreted from intestinal mucos for digestion of lactose






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






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






11. Unable to synthesize their own nutrients






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






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






14. Where mechanical and chemical digestion of food begins






15. Produced by the pancreas to digest carbohydrates






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






17. Place to store food






18. Secretes two substances: intrinsic factor and hydrchloric acid






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






20. To grind the food






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






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






23. Uses intracellular and extracellular digestion






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






25. Line the gastrovascular cavity secrete enzymes into the cavity






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






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






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






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






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






31. Produced by the pancreas for protein digestion






32. Converted to pepsin and synthesized by chief cells






33. Biting and chewing action of teeth






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






35. Improve food digestion






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






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






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






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






40. 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






41. Enzyme in saliva which hydrolyzes starch to maltose






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






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






44. Produced by the pancreas for fat digestion






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






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






47. Lacking lactase enzyme






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






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






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