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






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






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






4. 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






5. Secreted from the intestinal mucosa for polypeptide digestion






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






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






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






9. To grind the food






10. Line the gastrovascular cavity secrete enzymes into the cavity






11. 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






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






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






14. Uses intracellular and extracellular digestion






15. Secretes two substances: intrinsic factor and hydrchloric acid






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






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






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






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






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






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






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






23. Vessels of the lymphatic system






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






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






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






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






28. Converted to pepsin and synthesized by chief cells






29. Secreted from the intestinal mucosa for fat digestion






30. Unable to synthesize their own nutrients






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






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






33. Enzyme in saliva which hydrolyzes starch to maltose






34. 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






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






36. Produced by the pancreas for protein digestion






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






38. 1.5m long -functions in the absorption of salts and the absorption of any water not already absorbed by the small intestine






39. Improve food digestion






40. Place to store food






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






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






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






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






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






46. Produces enzymes such as amylase - trypsin - lipase






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






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






49. Where mechanical and chemical digestion of food begins






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