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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. The muscular tube leading from the mouth to the stomach






2. Secreted from the intestinal mucosa for polypeptide digestion






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






4. Secretes two substances: intrinsic factor and hydrchloric acid






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






6. Enzyme in saliva which hydrolyzes starch to maltose






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






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






9. Uses intracellular and extracellular digestion






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






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






12. Lacking lactase enzyme






13. To grind the food






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






15. Converted to pepsin and synthesized by chief cells






16. Line the gastrovascular cavity secrete enzymes into the cavity






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






18. 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






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






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






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






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






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






24. Place to store food






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






26. 1.5m long -functions in the absorption of salts and the absorption of any water not already absorbed by the small intestine






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






28. Where mechanical and chemical digestion of food begins






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






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






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






32. 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






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






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






35. Vessels of the lymphatic system






36. Produced by the pancreas to digest carbohydrates






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






38. Biting and chewing action of teeth






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






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






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






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






43. Secreted from intestinal mucos for digestion of lactose






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






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






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






47. Improve food digestion






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






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






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