Download MECHANICAL AND CHEMICAL DIGESTION

Name _______________________ Date Due ____________________ MECHANICAL AND CHEMICAL DIGESTION Learning Target: Compare and contrast mechanical and chemical digestion. (reasoning) Tootsie Roll Experiment Partner Task Time to dissolve 1 No chewing of Tootsie Roll 2 Chews Tootsie Roll 3. Provide an explanation for your results: ________________________________________________________ ___________________________________________________________________________________________ 4. Define mechanical digestion: _________________________________________________________________ ___________________________________________________________________________________________ Name a structure of the mouth that aided in mechanical digestion of the Tootsie Roll and explain its function. Structure Function 5. __________________________ ___________________________________________________________ 6. __________________________ ___________________________________________________________ 7. __________________________ ___________________________________________________________ Fun Fact: Did you know that you can tear a tooth ligament? Cracker Experiment 8. Describe what happens to a cracker (texture, taste changes) when you place it in your mouth and do not chew. ______________________________________________________________________________________ ___________________________________________________________________________________________ 9. Define chemical digestion: ___________________________________________________________________ ___________________________________________________________________________________________ Reviewing Enzymes Observe the diagram and relate it to the cracker experiment. 10. Enzyme in the mouth = _________________________ 11. Substrate = ______________________ 12. Product = ______________________ 13. Why were the chemical bonds able to be broken in the presence of the enzyme? ______________________ ___________________________________________________________________________________________ 14. Are enzymes reusable? ______ 15. Complete the analogy: The enzyme-­‐substrate complex can be compared to a _________________________ ____________________________________________ because ________________________________________ ___________________________________________________________________________________________
___________________________________________________________________________________________ Swallowing 16. After watching the video, would you say swallowing in an example of mechanical or chemical digestion? _________________________________ Why? ____________________________________________________ ___________________________________________________________________________________________ How is food kept out of the respiratory system during swallowing? 17. ________________________________________________________________________________________ ___________________________________________________________________________________________ 18. ________________________________________________________________________________________ ___________________________________________________________________________________________ Peristalsis 19. Is peristalsis an example of mechanical or chemical digestion? ________________________ 20. Add arrows, labels, and captions to the picture of peristalsis so that a friend who is not taking anatomy and physiology could understand the process. The Stomach Complete the diagram: carries out 21. _____________________________ 22. ________________________________ mixing 23. In the presence of ________, pepsinogen is churning converted into ____________________ which peristalsis converts _____________________ to peptides 24. The food that leaves the stomach is called _______________________ The Small Intestine 25. What is the difference between peristalsis and the segmentation that occurs in the small intestine? 26. State the function of each enzyme: Trypsin ____________________________________________________________________________________ Pancreatic amylase ___________________________________________________________________________ Lipase ______________________________________________________________________________________ Complete the introductory Notes