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