Study Notes
The digestive system is responsible for breaking down food and making nutrients available to the body. It involves a long tube from the mouth to the anus, where enzymes play a key role in digestion. Digested food is absorbed into the bloodstream, while undigested food is expelled from the body.
- Enzyme — proteins that speed up chemical reactions in the body Example: Amylase breaks down starch into sugars in the mouth.
- Peristalsis — rhythmic contractions that move food through the digestive tract Example: Moves food from the esophagus to the stomach.
- Bile — a digestive fluid produced by the liver and stored in the gallbladder Example: Emulsifies fats in the small intestine.
Exam Tips
Key Definitions to Remember
- Enzyme
- Peristalsis
- Bile
Common Confusions
- Difference between mechanical and chemical digestion
- Role of bile in digestion
Typical Exam Questions
- What is the role of enzymes in digestion? Enzymes break down complex molecules into simpler ones.
- How does peristalsis aid digestion? It moves food through the digestive tract.
- What is the function of bile? Bile emulsifies fats, aiding in their digestion.
What Examiners Usually Test
- Understanding of enzyme functions
- Knowledge of digestive system processes
- Ability to identify parts of the digestive system and their roles