Digestive System MCQs

  1. Which organ is primarily responsible for the absorption of nutrients? a) Stomach b) Small intestine c) Large intestine d) Liver Answer: b) Small intestine
  2. What is the name of the enzyme found in saliva that begins the digestion of carbohydrates? a) Pepsin b) Amylase c) Lipase d) Lactase Answer: b) Amylase
  3. Which part of the digestive system is responsible for the majority of digestion and nutrient absorption? a) Stomach b) Small intestine c) Large intestine d) Esophagus Answer: b) Small intestine
  4. What is the primary function of the large intestine? a) To digest proteins b) To absorb nutrients c) To reabsorb water and electrolytes, and form feces d) To produce bile Answer: c) To reabsorb water and electrolytes, and form feces
  5. Which organ produces bile, a substance that helps in the digestion of fats? a) Pancreas b) Stomach c) Liver d) Gallbladder Answer: c) Liver
  6. What is the role of the pancreas in digestion? a) To produce insulin and digestive enzymes b) To store bile c) To absorb nutrients d) To break down carbohydrates in the mouth Answer: a) To produce insulin and digestive enzymes
  7. Which valve controls the entry of food from the esophagus into the stomach? a) Pyloric sphincter b) Cardiac sphincter c) Ileocecal valve d) Anal sphincter Answer: b) Cardiac sphincter
  8. What is the primary function of the gastric glands in the stomach? a) To produce digestive enzymes and hydrochloric acid b) To absorb nutrients c) To reabsorb water d) To store bile Answer: a) To produce digestive enzymes and hydrochloric acid
  9. Which part of the digestive system is known for its role in immune response and contains lymphoid tissue? a) Small intestine b) Large intestine c) Appendix d) Pancreas Answer: c) Appendix
  10. What is the term for the wave-like contractions that move food through the digestive tract? a) Peristalsis b) Segmentation c) Absorption d) Propulsion Answer: a) Peristalsis
  11. Which of the following is NOT a function of the liver? a) Production of bile b) Metabolism of nutrients c) Production of digestive enzymes d) Detoxification of harmful substances Answer: c) Production of digestive enzymes
  12. What substance is secreted by the salivary glands and helps to lubricate food for easier swallowing? a) Bile b) Gastric acid c) Saliva d) Pancreatic juice Answer: c) Saliva
  13. Which digestive enzyme breaks down proteins in the stomach? a) Amylase b) Pepsin c) Lipase d) Lactase Answer: b) Pepsin
  14. What is the role of villi in the small intestine? a) To produce digestive enzymes b) To increase the surface area for nutrient absorption c) To store bile d) To regulate the movement of food Answer: b) To increase the surface area for nutrient absorption
  15. Which part of the digestive system connects the mouth to the stomach? a) Esophagus b) Small intestine c) Large intestine d) Rectum Answer: a) Esophagus

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