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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. Lacking lactase enzyme






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






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






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






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






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






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






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






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






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






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






12. 1.5m long -functions in the absorption of salts and the absorption of any water not already absorbed by the small intestine






13. Line the gastrovascular cavity secrete enzymes into the cavity






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






15. Produces enzymes such as amylase - trypsin - lipase






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






17. To grind the food






18. 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






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






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






21. Where mechanical and chemical digestion of food begins






22. Produced by the pancreas for fat digestion






23. Biting and chewing action of teeth






24. Converted to pepsin and synthesized by chief cells






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






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






27. Improve food digestion






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






29. Place to store food






30. Secreted from the intestinal mucosa for polypeptide digestion






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






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






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






34. Produced by the pancreas to digest carbohydrates






35. Uses intracellular and extracellular digestion






36. Enzyme in saliva which hydrolyzes starch to maltose






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






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






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






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






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






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






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






44. Secreted from intestinal mucos for digestion of lactose






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






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






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






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






49. Produced by the pancreas for protein digestion






50. 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