Digestive System Lab Report

--- These muscles are gateways that allow food and gastric juices to pass from one part of your digestive tract to the next. IV. Digestion 1. In Lab Section IV, Exercise 4, why did the solution in test tube 2 have two distinct layers? --- Two different liquids do not mix (or mix very little, only partly soluble) with each other they are heterogeneous resulting in forming two distinct layers or phases. 2. In Lab Section IV, Exercise 5, record observations of color changes observed in test tubes one through four at 30 minutes. Tube 0 min. 10 min. 20 min. 30 min. 1 Purple Pink Pink Pink 2 Purple Pink Pink Pink 3 Purple Purple Purple Purple 4 Purple Purple Purple Purple 3. What was the source of lipase in the experiment? --- 1% Pancreatin 4. What happens to the pH of a solution as fats are broken down? --- It became alkaline. 5. In Lab Section IV, Exercise 6, what color indicates a positive test for starch? --- Blue-black 6. In Lab Section IV, Exercise 7, record the rate of starch digestion for each test tube. Test Tube Temperatur e No. of Wells Tested Before Color Change x 30 Sec Elapsed Time (seconds) A 5c Denatured x 30 0 B 23c 12 x 30 360 C 37c 0 x 30 360 D 60c 12 x 30 360 E 80c Denatured by heat x 30 0 7. Using the data above, prepare a graph of elapsed time (Y-axis) for each temperature (X-axis). Sign and date your graph and submit it with this lab report. © 2024 Access Learning Systems SP24-B 3