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






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






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






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






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






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






7. Secreted from intestinal mucos for digestion of lactose






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






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






10. Improve food digestion






11. Secreted from the intestinal mucosa for fat digestion






12. Enzyme in saliva which hydrolyzes starch to maltose






13. Produced by the pancreas to digest carbohydrates






14. Unable to synthesize their own nutrients






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






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






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






18. Produced by the pancreas for fat digestion






19. Produces enzymes such as amylase - trypsin - lipase






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






21. Secretes two substances: intrinsic factor and hydrchloric acid






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






23. Vessels of the lymphatic system






24. Line the gastrovascular cavity secrete enzymes into the cavity






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






26. 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






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






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






29. 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






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






31. 1.5m long -functions in the absorption of salts and the absorption of any water not already absorbed by the small intestine






32. Place to store food






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






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






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






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






37. 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






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






39. Converted to pepsin and synthesized by chief cells






40. Lacking lactase enzyme






41. Secreted from the intestinal mucosa for polypeptide digestion






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






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






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






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






46. Biting and chewing action of teeth






47. Where mechanical and chemical digestion of food begins






48. Uses intracellular and extracellular digestion






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






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