Blood and Circulation Lab Report Digestive System Lab Report

BioLab3

Digestive System Lab Report

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The lab report is unique each semester and checks have been put into place to ensure students are doing their own work. Copying from other students or from outside sources will result in a zero on the accompanying lab quiz.

1. Human Digestive System

1. Which enzyme is produced by the stomach? Which type of food does this enzyme breakdown?

1. Why does the stomach produce acid? Which acid is produced?

1. What is the difference between a bolus and chyme?

1. What is the function of the gall bladder?

1. Villi

1. Based on Lab, Section II, Exercise 1, draw and label a villus using the following terms: venule, capillary, lymph vessel, arteriole, and simple columnar epithelium. Sign, date and prepare an image of your drawing and include it with this lab report.

1. What is the function of villi?

1. Based on Lab, Section II, Exercise 2, in one or two paragraphs, describe the journey of food through numerous specialized cavities as it enters the gastrointestinal tract, is broken down, absorbed and eliminated from the body.

1. Fetal Pig Digestive System

1. Based on Lab, Section III, Exercise 3, what role do the rugae play in digestion?

1. What is the difference between the glottis and epiglottis?

1. Where is the liver located?

1. How does the liver play a role in digestion?

1. Is the liver part of the gastrointestinal tract?

1. Digestion

1. What is a degradation reaction?

1. Based on Lab, Section IV, Exercise 4, why was there a separation of solutions in test tube 2 and no separation in test tube 1?

1. What does “emulsification” mean?

1. Based on Lab, Section IV, Exercise 5, record observations of color changes observed in test tubes 1-4.

1. What is lipase?

1. Why was bile added to test tubes 2 and 3? How did the end results compare for these test tubes?

1. What is the role of pancreatin in the experiment?

1. Based on Lab, Section IV, Exercise 6, what was the substrate in the reaction?

1. Describe the enzymatic reaction that was tested in Exercise 6.

1. Starch is a polysaccharide; maltose is a

1. Which color will be evident after starch digestion occurs?

1. Based on Lab, Section IV, Exercise 7 record the rate of starch digestion for each test tube.

1. Based on the data above, prepare a graph of elapsed time (Y-axis) for each temperature (X-axis). Sign and date your graph and submit with this lab report.

1. What is the purpose of using salivary amylase in this experiment?

Summary Questions

1. Compare the processes that occur in the large versus small intestine.

1. Which is longer, the large or small intestine?

1. What is peristalsis?

1. About how long is the esophagus? Where is it located within the GI tract?

1. Name the three regions of the small intestine.

1. Where is the ileocecal valve and what does it do?

1. What was the purpose of the litmus solution in the fat digestion experiment?

1. Hydrochloric acid is released by cells lining the

1. Name the substrate, enzyme, and products for the digestion of starch.

1. Name the substrate, enzyme, and products for the digestion of fat.

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