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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 intestinal mucosa for digestion of maltose - lactose - sucrose






2. Converted to pepsin and synthesized by chief cells






3. Produced by the pancreas for fat digestion






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






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






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






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






8. 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






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






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






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






12. Produced by the pancreas to digest carbohydrates






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






14. Secreted from the intestinal mucosa for fat digestion






15. Secreted from intestinal mucos for digestion of lactose






16. Lacking lactase enzyme






17. 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






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






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






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






21. Line the gastrovascular cavity secrete enzymes into the cavity






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






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






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






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






26. Improve food digestion






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






28. Uses intracellular and extracellular digestion






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






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






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






32. 1.5m long -functions in the absorption of salts and the absorption of any water not already absorbed by the small intestine






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






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






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






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






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






38. Biting and chewing action of teeth






39. To grind the food






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






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






42. Vessels of the lymphatic system






43. Secretes two substances: intrinsic factor and hydrchloric acid






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






45. Place to store food






46. 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






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






48. Unable to synthesize their own nutrients






49. Where mechanical and chemical digestion of food begins






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