Digestive Processes Practice Quiz: Test Your AP Biology Knowledge

📚 Topic Summary

Digestion is the process by which large food molecules are broken down into smaller molecules that can be absorbed into the bloodstream and used by the body's cells. This process involves both mechanical and chemical digestion. Mechanical digestion includes physical processes like chewing and churning, while chemical digestion involves enzymes that break down food molecules through hydrolysis.

🧠 Part A: Vocabulary

Match the terms with their correct definitions:

1. Term: Peristalsis
2. Term: Chyme
3. Term: Villi
4. Term: Amylase
5. Term: Bile

1. Definition: The pulpy acidic fluid which passes from the stomach to the small intestine, consisting of gastric juices and partly digested food.
2. Definition: A substance produced by the liver that emulsifies fats, aiding in their digestion and absorption.
3. Definition: A type of enzyme that catalyzes the hydrolysis of starch into sugars.
4. Definition: Small, finger-like projections that protrude from the epithelial lining of the small intestine, increasing the surface area for absorption.
5. Definition: The involuntary constriction and relaxation of the muscles of the intestine or another canal, creating wave-like movements which push the contents forward.

📝 Part B: Fill in the Blanks

The digestive system begins in the mouth, where food is broken down mechanically by __________ and chemically by __________, an enzyme that breaks down starch. The stomach mixes food with gastric juices containing __________ to digest proteins. The small intestine is the primary site for nutrient __________. The __________ produces bile, which aids in fat digestion, and the __________ produces many digestive enzymes. Finally, the large intestine absorbs __________ and forms solid waste.

🧪 Part C: Critical Thinking

Explain how the structure of the small intestine (villi and microvilli) contributes to its function in nutrient absorption.