The Human Digestive System
  • 1. What enzyme starts the digestion of carbohydrates?
A) Pepsin
B) Amylase
C) Trypsin
D) Lipase
  • 2. Where does the majority of digestion occur?
A) Small intestine
B) Esophagus
C) Mouth
D) Stomach
  • 3. Which organ produces bile?
A) Gallbladder
B) Pancreas
C) Stomach
D) Liver
  • 4. What layer of the digestive tract is responsible for absorption?
A) Submucosa
B) Mucosa
C) Muscularis
D) Serosa
  • 5. What is the last section of the large intestine called?
A) Colon
B) Ileum
C) Rectum
D) Cecum
  • 6. Which structure prevents food from entering the windpipe?
A) Epiglottis
B) Uvula
C) Pharynx
D) Larynx
  • 7. What is the tube called that connects the mouth to the stomach?
A) Trachea
B) Pharynx
C) Esophagus
D) Duodenum
  • 8. How long is the average human small intestine?
A) About 15 feet
B) About 5 feet
C) About 20 feet
D) About 30 feet
  • 9. What is the first part of the small intestine?
A) Duodenum
B) Cecum
C) Jejunum
D) Ileum
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