MDCAT Biology Quiz 14 – DIGESTION Leave a Comment / By studentseoasis.org / July 24, 2025 1. The human digestive system begins at the: A) Pharynx B) Esophagus C) Mouth D) Stomach None 2. Food moves from mouth to stomach via: A) Trachea B) Esophagus C) Small intestine D) Pharynx None 3. The muscular movement that pushes food through the esophagus is called: A) Digestion B) Peristalsis C) Swallowing D) Assimilation None 4. Which organ stores and mixes food with gastric juices? A) Mouth B) Small intestine C) Stomach D) Liver None 5. Chyme is produced in the: A) Mouth B) Stomach C) Prevent food entering tracheaC) Liver D) Large intestine None 6. The longest part of the digestive system is the: A) Stomach B) Small intestine C) Large intestine D) Esophagus None 7. Most nutrient absorption occurs in the: A) Stomach B) Large intestine C) Small intestine D) Mouth None 8. The last section of the small intestine is called: A) Duodenum B) Jejunum C) Ileum D) Colon None 9. The large intestine mainly absorbs: A) Proteins B) Fats C) Water and salts D) Glucose None 10. Undigested waste is stored in: A) Rectum B) Liver C) Pancreas D) Stomach None 11. Egestion occurs through the: A) Esophagus B) Anus C) Stomach D) Duodenum None 12. Which part is responsible for initial carbohydrate digestion? A) Mouth B) Stomach C) Small intestine D) Liver None 13. The entry point of bile and pancreatic juice into small intestine is the: A) Jejunum B) Duodenum C) Ileum D) Colon None 14. Which part connects stomach to small intestine? A) Pyloric sphincter B) Cardiac sphincter C) Esophageal valve D) Rectum None 15. Which organ forms feces? A) Stomach B) Small intestine C) Large intestine D) Pancreas None 16. The pharynx is common to: A) Digestive system only B) Respiratory system only C) Both digestive and respiratory systems D) Circulatory system None 17. The appendix is attached to: A) Ileum B) Cecum C) Rectum D) Jejunum None 18. Food is churned mechanically in: A) Esophagus B) Liver C) Stomach D) Rectum None 19. The primary role of villi is to: A) Secrete enzymes B) Produce bile C) Absorb nutrients D) Digest proteins None 20. Which section of the small intestine is mainly responsible for absorption? A) Duodenum B) Jejunum C) Ileum D) Colon None 21. Colon is another name for: A) Small intestine B) Large intestine C) Esophagus D) Rectum None 22. The function of rectum is to: A) Absorb glucose B) Store waste before elimination C) Produce digestive enzymes D) Absorb proteins None 23. Which part is involved in both chemical and mechanical digestion? A) Liver B) Esophagus C) Mouth D) Large intestine None 24. The muscular tube connecting pharynx to stomach is called: A) Larynx B) Esophagus C) Duodenum D) Cecum None 25. What prevents food from entering the windpipe? A) Larynx B) Tongue C) Epiglottis D) Soft palate None 26. Salivary glands secrete: A) Bile B) Amylase C) Pepsin D) Trypsin None 27. Saliva mainly begins digestion of: A) Proteins B) Fats C) Carbohydrates D) Minerals None 28. Which enzyme is secreted by stomach? A) Amylase B) Lipase C) Pepsin D) Trypsin None 29. The acidic environment of stomach is due to: A) Pepsin B) Hydrochloric acid C) Bile D) Mucus None 30. Which organ produces bile? A) Pancreas B) Liver C) Stomach D) Gall bladder None 31. Bile is stored in: A) Liver B) Stomach C) Gall bladder D) Small intestine None 32. Function of bile is to: A) Digest carbohydrates B) Emulsify fats C) Digest proteins D) Absorb water None 33. Pancreas secretes enzymes into: A) Stomach B) Liver C) Gall bladder D) Duodenum None 34. Pancreatic juice contains: A) Pepsin only B) Amylase, lipase, and trypsin C) Bile salts D) Mucus only None 35. Liver is responsible for: A) Nutrient absorption B) Producing digestive enzymes C) Producing bile and detoxification D) Churning food None 36. Function of mucus in digestive tract is to: A) Absorb nutrients B) Digest proteins C) Protect lining from acid and enzymes D) Absorb water None 37. The pancreas is both: A) Digestive and excretory gland B) Digestive and endocrine gland C) Excretory and respiratory gland D) Endocrine and respiratory gland None 38. Trypsin digests: A) Carbohydrates B) Fats C) Proteins D) Water None 39. Absorption of nutrients mainly occurs through: A) Smooth muscles B) Gastric glands C) Intestinal villi D) Liver cells None 40. Gall bladder releases bile into: A) Liver B) Stomach C) Duodenum D) Colon None 41. The process of breaking down large fat globules into small droplets is called: A) Digestion B) Peristalsis C) Emulsification D) Ingestion None 42. Which part secretes intestinal juice? A) Stomach B) Small intestine C) Large intestine D) Liver None 43. Function of intestinal glands is to: A) Produce bile B) Absorb fats C) Secrete digestive enzymes D) Produce hydrochloric acid None 44. Bile helps in digestion of: A) Proteins B) Fats C) Carbohydrates D) Water None 45. Which part is NOT involved in digestion? A) Stomach B) Small intestine C) Large intestine D) Pancreas None 46. Digestive enzymes act on: A) Broken food particles only B) Undigested food only C) Specific nutrients (proteins, fats, carbohydrates) D) Water molecules only None 47. Gall bladder function is related to: A) Enzyme secretion B) Bile storage C) Mucus production D) Detoxification None 48. The small intestine receives secretions from: A) Liver and pancreas B) Stomach and liver C) Pancreas and rectum D) Large intestine and pancreas None 49. Liver helps in digestion by: A) Producing pepsin B) Producing bile for fat digestion C) Absorbing proteins D) Storing nutrients only None 50. What prevents autodigestion of stomach walls? A) Mucus secretion B) Bile salts C) Villi presence D) Amylase activity None 1 out of 50 Time's up
