BioLab3<\/p>\n
Digestive System Lab Report
\nName, date, course and section required for password:<\/p>\n
I.\tHuman Digestive System<\/p>\n
1.\tWhich enzyme is secreted into the mouth to begin chemical digestion? What food is digested by this enzyme?<\/p>\n
2.\tWhat is the purpose of bile?<\/p>\n
3.\tWhy does the stomach contain deep folds? What are they called?<\/p>\n
4.\tWhat is the function of the pancreas?<\/p>\n
II.\tVilli<\/p>\n
1.\tBased 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.<\/p>\n
2.\tWhat is the function of the lymph vessel within a villus?<\/p>\n
3.\tWhat is the difference between villi and microvilli?<\/p>\n
4.\tBased 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.<\/p>\n
III.\tFetal Pig Digestive System<\/p>\n
1.\tBased on Lab, Section III, Exercise 3, what is the difference between the hard and soft palate?<\/p>\n
2.\tWhat is the difference between the glottis and the epiglottis?<\/p>\n
3.\tWhere is the stomach located?<\/p>\n
4.\tWhat role do the sphincters play in digestion?<\/p>\n
IV.\tDigestion<\/p>\n
1.\tBased on Lab, Section IV, Exercise 4, why did the solution in test tube 2 have two distinct layers?<\/p>\n
2.\tBased on Lab, Section IV, Exercise 5, record observations of color changes observed in test tubes one through four at 30 minutes.<\/p>\n
3.\tWhat was the source of lipase in the experiment?<\/p>\n
4.\tWhat happens to the pH of a solution as fats are broken down?<\/p>\n
5.\tBased on Lab, Section IV, Exercise 6, describe the effect of temperature on the enzymatic reaction.<\/p>\n
6.\tBased on Lab, Section IV, Exercise 7 record the rate of starch digestion for each test tube.<\/p>\n
Test Tube\tTemperature\tNo. of Wells Tested Before Color Change\tx 30 Sec\tElapsed Time (seconds)
\nA\t\t\tx 30
\nB\t\t\tx 30
\nC\t\t\tx 30
\nD\t\t\tx 30
\nE\t\t\tx 30<\/p>\n
7.\tUsing 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.<\/p>\n
8.\tDiscuss the results shown in your graph.<\/p>\n
9.\tDescribe the function of salivary amylase in digestion.<\/p>\n
Summary Questions<\/p>\n
1.\tWhat is the function of the capillaries in a villus?<\/p>\n
2.\tWhat is the difference between the cardiac sphincter and pyloric sphincter? Describe the location and function of each.<\/p>\n
3.\tWhat sort of digestion occurs in the mouth?<\/p>\n
4.\tDescribe the processes that occur in the small intestine.<\/p>\n
5.\tWhere is the pharynx and what is its function?<\/p>\n
6.\tIs the appendix a vital organ? Where is it found in the human body?<\/p>\n
7.\tName three characteristics of enzymes and explain how they function in degradation reactions.<\/p>\n
8.\tWhat was the purpose of the litmus solution in the fat digestion experiment?<\/p>\n
9.\tHow did you determine when starch digestion was complete?<\/p>\n
10.\t Compare average human body temperature to the optimum temperature of salivary amylase.<\/p>\n","protected":false},"excerpt":{"rendered":"
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