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






2. Lacking lactase enzyme






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






4. Place to store food






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






6. Secreted from the intestinal mucosa for polypeptide digestion






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






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






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






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






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






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






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






14. Produced by the pancreas for fat digestion






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






16. Converted to pepsin and synthesized by chief cells






17. 1.5m long -functions in the absorption of salts and the absorption of any water not already absorbed by the small intestine






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






19. Produced by the pancreas for protein digestion






20. To grind the food






21. Unable to synthesize their own nutrients






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






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






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






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






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






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






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






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






30. Secreted from intestinal mucos for digestion of lactose






31. Where mechanical and chemical digestion of food begins






32. Enzyme in saliva which hydrolyzes starch to maltose






33. Biting and chewing action of teeth






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






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






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






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






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






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






40. Line the gastrovascular cavity secrete enzymes into the cavity






41. Produced by the pancreas to digest carbohydrates






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






43. Produces enzymes such as amylase - trypsin - lipase






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






45. 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






46. Vessels of the lymphatic system






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






48. Secretes two substances: intrinsic factor and hydrchloric acid






49. 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






50. 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