Pre-Lab: Digestion of Dairy Products
Problem How can an enzyme deficiency affect digestion?
Materials well plate, sheet of paper, glucose solution, milk, milk-digestion aid, toothpicks, glucose test strips
Lab Manual Chapter 30 Lab
Skills Focus Control Variables, Infer, Draw Conclusions
Connect to the Food is both a source of raw materials and a source of energy for your body. First the food must pass through your digestive system, where mechanical and chemical processes break the food down into smaller molecules. Enzymes play an essential role in chemical digestion. Different enzymes are needed to digest proteins, fats, and carbohydrates. In this lab, you will explore the role of enzymes in the digestion of milk and other dairy products.
Review What is an enzyme? Why are enzymes necessary for maintaining homeostasis?
Review Where do most digestive enzymes enter the digestive system?
Compare and Contrast Use glucose and sucrose to explain the difference between a monosaccharide and a disaccharide.
Preview the procedure in the lab manual.
Design an Experiment What is the purpose of the glucose solution?
Control Variables What is the control in this lab?
Communicate Read the instructions on the package of glucose test strips. Then, briefly describe how you will test your samples for the presence of glucose.
Visit Chapter 30 online to test yourself on chapter content and to find activities to help you learn.
Untamed Science Video Hold your noses as you join the Untamed Science crew to learn what scientists can discover about animals by investigating their scat.
Data Analysis Use nutrient data to plan a lunch that meets your own personal requirements.
Tutor Tube Tune in to Tutor Tube for another perspective on how homeostasis works in the human body.
Art Review Review your understanding of human body systems.
Art in Motion Watch peristalsis in action in the esophagus.