Human Digestive System
Q. What is the function of the esophagus?
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A.
Digests food
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B.
Absorbs nutrients
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C.
Transports food to the stomach
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D.
Produces enzymes
Solution
The esophagus is a muscular tube that transports food from the mouth to the stomach.
Correct Answer: C — Transports food to the stomach
Q. What is the main function of the stomach?
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A.
Absorption of nutrients
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B.
Mechanical and chemical digestion
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C.
Storage of bile
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D.
Production of insulin
Solution
The main function of the stomach is to perform mechanical and chemical digestion of food.
Correct Answer: B — Mechanical and chemical digestion
Q. What is the primary function of the small intestine?
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A.
Absorption of nutrients
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B.
Production of bile
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C.
Storage of waste
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D.
Mechanical digestion
Solution
The primary function of the small intestine is the absorption of nutrients from digested food.
Correct Answer: A — Absorption of nutrients
Q. What is the primary role of villi in the small intestine?
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A.
Secretion of enzymes
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B.
Absorption of nutrients
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C.
Mechanical digestion
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D.
Storage of waste
Solution
Villi are small, finger-like projections in the small intestine that increase the surface area for the absorption of nutrients.
Correct Answer: B — Absorption of nutrients
Q. What is the role of the pancreas in the digestive system?
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A.
Secretes digestive enzymes
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B.
Absorbs nutrients
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C.
Stores bile
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D.
Produces hydrochloric acid
Solution
The pancreas secretes digestive enzymes that help break down carbohydrates, proteins, and fats in the small intestine.
Correct Answer: A — Secretes digestive enzymes
Q. Which enzyme begins the digestion of carbohydrates in the mouth?
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A.
Pepsin
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B.
Amylase
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C.
Lipase
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D.
Trypsin
Solution
Salivary amylase is the enzyme that begins the digestion of carbohydrates in the mouth.
Correct Answer: B — Amylase
Q. Which organ produces bile?
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A.
Pancreas
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B.
Liver
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C.
Gallbladder
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D.
Stomach
Solution
The liver produces bile, which is stored in the gallbladder and helps in the digestion of fats.
Correct Answer: B — Liver
Q. Which part of the digestive system is primarily responsible for water absorption?
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A.
Mouth
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B.
Stomach
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C.
Small intestine
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D.
Large intestine
Solution
The large intestine is primarily responsible for the absorption of water and electrolytes from indigestible food matter.
Correct Answer: D — Large intestine
Q. Which structure prevents food from entering the trachea during swallowing?
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A.
Epiglottis
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B.
Uvula
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C.
Pharynx
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D.
Larynx
Solution
The epiglottis is a flap that covers the trachea during swallowing to prevent food from entering the airway.
Correct Answer: A — Epiglottis
Q. Which vitamin is primarily absorbed in the large intestine?
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A.
Vitamin A
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B.
Vitamin B12
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C.
Vitamin K
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D.
Vitamin C
Solution
Vitamin K is primarily absorbed in the large intestine, where it is produced by gut bacteria.
Correct Answer: C — Vitamin K
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