with your d25 sign-on and your 151 _ _ _ _ password.
- Have you ever felt hungry after being physical (like a soccer game, swim meet, etc.)?
- Why do you think we get hungry after exercise?
- What do our cells need to stay healthy?
- How does the food we eat get to the cells in our body?
- Discuss the Digestive Process with this visual.
- Why does food need to be digested? What is the purpose of the Digestive System?
- Go over vocabulary:
- digestion: the process of breaking down food into simpler forms.
- digestive system: the body system that breaks down the food we eat so our bodies can use it for energy and other needs.
- enzymes: Chemicals that break down large, complex food particles into smaller, simpler nutrients.
- Explain directions.
- Use sticks to create groups of four.
- Have students gather materials.
- Have students complete the chart and questions while the lab is taking place.
- Read SRB pages 81-88 while your simulated digestion is happening.
- Create a blog post entitled, "How Our Cells Get Nutrients."
If you have extra time, discuss what you think the answers are to these questions:
- Does the amount of enzyme (meat tenderizer) affect the rate of digestion (how fast it digests)?
- Does the temperature of the gelatin affect the rate of digestion (how fast it digests)?
- Does physical digestion (breaking down food into smaller pieces by chewing or cutting) affect the rate of digestion (how fast it digests)?
- So what happened to the gelatin that touched the enzyme (meat tenderizer)?
- What happened to the gelatin that wasn't touched by the enzyme (meat tenderizer)?
- How did the gelatin in Cup 1 change? Did its ability to pass through the filter change?
- Did the enzyme powder cause the change in Cup 1? What evidence do you have to support your answer?
- What was the one difference between Cups 1 and 2? Was there a change to the gelatin in cup 2?
- Which material from our lab was a metaphor for the bloodstream? In which cup did the gelatin’s nutrients reach the “bloodstream”?
- Based on your experimental findings, why do you think it’s important for the food you eat to be digested?
- How is food digested in the digestion system? What type of digestion did the model demonstrate?
- What do you think would happen if you ate lots of food but couldn’t digest it? Would you still be hungry? Would you have lots of energy? Would you perform well in a sports competition? Explain!