PART A: MULTIPLE CHOICE (20 Marks) The main function of the digestive system is:

Here are the answers to the multiple-choice questions:

1. The main function of the digestive system is to break down food and absorb nutrients.

   • c) Break down food and absorb nutrients

2. The liver produces bile.

   • c) Liver

3. Most chemical digestion occurs in the small intestine.

   • c) Small intestine

4. The finger-like projections that increase absorption are called villi.

   • b) Villi

5. The gallbladder stores bile.

   • b) Gallbladder

6. Gas exchange occurs in the alveoli.

   • c) Alveoli

7. During inhalation, the diaphragm contracts and moves downward.

   • b) Contracts and moves downward

8. Carbon dioxide is removed from the body during exhalation.

   • c) Carbon dioxide

9. The trachea is also known as the windpipe.

   • b) Windpipe

10. Red blood cells contain hemoglobin.

    • c) Hemoglobin

11. An artery carries blood away from the heart.

    • c) Artery