Digestive System MCQs – T4Tutorials.com

Which organ is primarily responsible for the absorption of nutrients?
a) Stomach
b) Small intestine
c) Large intestine
d) Liver
Answer: b) Small intestine
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
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
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
Which organ produces bile, a substance that helps in the digestion of fats?
a) Pancreas
b) Stomach
c) Liver
d) Gallbladder
Answer: c) Liver
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
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

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
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
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
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
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

Which digestive enzyme breaks down proteins in the stomach?
a) Amylase
b) Pepsin
c) Lipase
d) Lactase
Answer: b) Pepsin
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
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