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






2. Secretes two substances: intrinsic factor and hydrchloric acid






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






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






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






6. Improve food digestion






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






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






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






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






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






12. Produced by the pancreas for fat digestion






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






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






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






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






17. Secreted from the intestinal mucosa for polypeptide digestion






18. 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






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






20. Unable to synthesize their own nutrients






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






22. Line the gastrovascular cavity secrete enzymes into the cavity






23. Produced by the pancreas for protein digestion






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






25. Produces enzymes such as amylase - trypsin - lipase






26. 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






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






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






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






30. Produced by the pancreas to digest carbohydrates






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






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






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






34. To grind the food






35. Place to store food






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






37. Biting and chewing action of teeth






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






39. Enzyme in saliva which hydrolyzes starch to maltose






40. Converted to pepsin and synthesized by chief cells






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






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






44. Lacking lactase enzyme






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






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






47. Secreted from the intestinal mucosa for fat digestion






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






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






50. Where mechanical and chemical digestion of food begins