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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. Where mechanical and chemical digestion of food begins






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






3. Uses intracellular and extracellular digestion






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






5. To grind the food






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






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






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






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






10. Unable to synthesize their own nutrients






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






12. Line the gastrovascular cavity secrete enzymes into the cavity






13. Secreted from the intestinal mucosa for polypeptide digestion






14. Lacking lactase enzyme






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






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






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






18. Secreted from the intestinal mucosa for fat digestion






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






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






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






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






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






24. Produces enzymes such as amylase - trypsin - lipase






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






26. Produced by the pancreas for fat digestion






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






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






29. Improve food digestion






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






31. Biting and chewing action of teeth






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






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






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






35. 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






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






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






38. Enzyme in saliva which hydrolyzes starch to maltose






39. Produced by the pancreas for protein digestion






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






41. Secretes two substances: intrinsic factor and hydrchloric acid






42. 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






43. Vessels of the lymphatic system






44. 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






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






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






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






48. Converted to pepsin and synthesized by chief cells






49. Secreted from intestinal mucos for digestion of lactose






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