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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. Secretes two substances: intrinsic factor and hydrchloric acid






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






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






4. 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






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






6. Biting and chewing action of teeth






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






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






9. Produced by the pancreas to digest carbohydrates






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






11. Unable to synthesize their own nutrients






12. Lacking lactase enzyme






13. Secreted from the intestinal mucosa for polypeptide digestion






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






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






16. Vessels of the lymphatic system






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






18. 1.5m long -functions in the absorption of salts and the absorption of any water not already absorbed by the small intestine






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






20. Place to store food






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






22. Enzyme in saliva which hydrolyzes starch to maltose






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






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






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






26. Line the gastrovascular cavity secrete enzymes into the cavity






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






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






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






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






31. 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






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






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






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. The muscular tube leading from the mouth to the stomach






36. Produced by the pancreas for fat digestion






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






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






39. Improve food digestion






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






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






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






43. Uses intracellular and extracellular digestion






44. Converted to pepsin and synthesized by chief cells






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






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






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






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






49. Produces enzymes such as amylase - trypsin - lipase






50. Where mechanical and chemical digestion of food begins