exerise 8

which phisio ex is it from and which chapter.

Boiling will denature the lipase.  Let us know which activity you are on and we can help you with the rest!

Fat Digestion by Pancreatic Lipase and the Action of Bile
The following questions refer to Activity 4: Assessing Fat Digestion by Pancreatic Lipase and the Action of Bile.
16. Describe the activity of lipase with and without the addition of bile salts. The activity of lipase is greater with the addition of bile salts.
17. Is the activity of bile a chemical or a physical process? Explain. Bile activity is a physical process; it breaks fat particles into smaller fat particles.
18. What pH resulted in the maximum pancreatic lipase activity?  7
How does this optimal pH correlate to the enzyme’s location in the body? The pH of the small intestines is neutral
19. Explain whether or not we can determine fat hydrolysis in tube 5. Why or why not? We cannot determine if fat hydrolysis occurred in tube 5, which had a buffer of 2.0, and the pH of the solution after incubation was still 2.0. There could have been activity at pH 2.0 that was not detectable by this assay method.
20. What is the substrate in this experiment?  vegetable oil (fat) What subunits does lipase form? fatty acids and monoglyceride

Physical Process: Mechanisms of Food Propulsion and Mixing
21. Explain the significance of the movement of the tongue during swallowing. The tongue initiates and controls the buccal phase of swallowing by pushing contents into the pharynx.
22. Describe three events that occur during the pharyngeal-esophageal phase of deglutition. Mouth, nasopharynx, and larynx are blocked; upper esophageal sphincter relaxes to open esophagus; food moves through esophagus by pressure gradients created by peristalsis
23. What was the time interval that you recorded between the first and second sound? 1-2 seconds

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