How Much Do You Know About the Human Digestive System? Directions: Read and Answer Each Question Carefully Based on What You Know About the Digestive System

Name: ______Period: ______Date:______Digestive System Pre-Assessment

How Much Do You Know About the Human Digestive System? Directions: Read and answer each question carefully based on what you know about the digestive system. Part A: Multiple Choice: Choose the letter that best corresponds to the question or statement provided. Write your answer in letterform to the left of the question. 1. What is the main function of the digestive system? a) To transport blood throughout the body b) To process food for energy use for the body c) To provide support and move the body d) To respond to external changes in the environment

2. Proteins are large molecules made up of many smaller units called ______: a) Simple Sugars b) Lipids c) Amino Acids d) Enzymes

3. Carbohydrates are the main sources of energy for our body. They can be broken down into smaller molecules called ______. a) Simple Sugars b) Lipids c) Amino Acids d) Enzymes

4. What is an enzyme? a) An organ of the body that helps in the digestion process by releasing digestion chemicals b) A type of nutrient (food) consumed that is essential for human life c) An acid that helps dissolve and remove unhealthy food from the body d) A protein that speeds up the rate of chemical reactions so that food can be broken down

Part B: True or False: To the left of each question 5-10, circle T for a true statement or F for a false statement.

T / F 5. Food is digested, or broken down into smaller pieces, only by mechanical means (chewing, mixing, or churning).

T / F 6. Everything we eat can be completely digested and used by our body.

T / F 7. Bacteria play an important role in breaking down intestinal materials and making vitamins for our body.

T / F 8. The small intestine is the longest organ in the digestive system.

T / F 9. The process of digestion begins once food enters the stomach.

T / F 10. Food does not directly pass through accessory organs like the liver, gall bladder, and pancreas. Part C, Number 11 a-f: Labeling: Match the appropriate organ from the word bank on the appropriate line provided. Each word should be used only once.

Word Bank:

Gall Bladder

Stomach a)

Small Intestine

Large Intestine

Mouth

Rectum f) Pancreas b) Liver g) c) h)

Part D: Matching: Match the digestive organ to the correct function of that organ. Each letter should be used only once. Digestive Organs Functions

______12. Small Intestine a) A J-shaped, muscular sac that stores food and helps digest it; it is a very acidic place ______13. Large Intestine b) A very long and coiled tube where most ______14. Mouth digestion and absorption nutrients occurs

______15. Liver c) A muscular tube which connects the throat to the stomach; moves food in a wavelike motion ______16. Stomach d) A short, wide tube where water is absorbed ______17. Esophagus from undigested food, bacteria are also present

e) The opening through which food passes into the body, the teeth and tongue are found here

f) A large, lobed organ that produces and releases bile which helps digest fats