Digestive Homeostasis Worksheet
A Grade 9 science worksheet exploring the concept of digestive homeostasis, including its mechanisms, key organs, and related disorders.
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Digestive Homeostasis Worksheet
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Read each question carefully and answer to the best of your ability. For multiple-choice questions, circle the correct option. For fill-in-the-blank and short answer questions, write your answers in the space provided. Refer to the diagram of the digestive system as needed.
1. Which of the following best describes homeostasis in the digestive system?
The process of breaking down food into smaller molecules.
Maintaining a stable internal environment within the digestive tract.
The absorption of nutrients into the bloodstream.
The elimination of undigested waste products.
2. The pH level in the stomach is typically very low (acidic). How does the body maintain this pH and prevent damage to the stomach lining?
By secreting bicarbonate into the stomach.
By neutralizing the acid with alkaline foods.
Through the production of a protective mucus layer.
By constantly replacing stomach cells.
3. The is responsible for producing bile, which aids in the digestion of fats.
4. Hormones like and play a crucial role in regulating digestive processes.
5. The absorption of most nutrients primarily occurs in the .
6. Peristalsis is the involuntary constriction and relaxation of the muscles of the intestine or another canal, creating wavelike movements that push the contents forward.
True
False
7. The large intestine is the primary site for nutrient absorption.
True
False
8. Explain the role of negative feedback loops in maintaining digestive homeostasis, providing an example.
9. Describe how the body regulates blood glucose levels after a meal, relating it to digestive homeostasis.
Use the words below to complete the sentences.
10. The produces enzymes that digest carbohydrates, proteins, and fats.
11. When blood glucose levels are high, the releases to lower them.
12. The main organ for chemical digestion of proteins is the .