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






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






3. Where mechanical and chemical digestion of food begins






4. Secreted from intestinal mucos for digestion of lactose






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






6. Secretes two substances: intrinsic factor and hydrchloric acid






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






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






9. 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






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






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






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






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






14. Lacking lactase enzyme






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






16. Line the gastrovascular cavity secrete enzymes into the cavity






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






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






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






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






22. 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






23. Secreted from the intestinal mucosa for fat digestion






24. Improve food digestion






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






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






27. Secreted from the intestinal mucosa for polypeptide digestion






28. Vessels of the lymphatic system






29. Produces enzymes such as amylase - trypsin - lipase






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






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






32. Produced by the pancreas for fat digestion






33. To grind the food






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






35. Converted to pepsin and synthesized by chief cells






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






37. Biting and chewing action of teeth






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






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






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






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






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






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






44. Uses intracellular and extracellular digestion






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






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






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






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






49. Enzyme in saliva which hydrolyzes starch to maltose






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