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Purpose The student will demonstrate and describe the action of digestive agents on two major nutrients (carbohydrates and lipids) Materials . Timer (with a second hand) . Small glasses (something similar to a test tube if possible) . . Plastic wrap Measuring spoons – Tablespoon (tbsp.) & % teaspoon (tsp) Plain cracker (unsalted) . Water • Vegetable oil Red food coloring Liquid detergent (dishwashing detergent is fine as long as there are no added ingredients such as bleach or antibacterials) Procedure Part A: Carbohydrate Digestion 1. Prior to beginning this experiment, rinse your mouth with plain water 2. Obtain 2 plain crackers (each small enough to place in your mouth) of the same size. Place one cracker in on your tongue (do not chew or swallow) all allow it to dissolve. Time how long it takes for you to taste canvas.fscj.edu/courses/36671/assignments/480133?module_item_id=1077971 2. Obtain 2 plain crackers (each small enough to place in your mouth) of the same size. Place one cracker in on your tongue (do not chew or swallow) all allow it to dissolve. Time how long it takes for you to taste sweetness. Record the time in seconds. 3. Swallow the cracker and rinse your mouth with plain water. 4. Place the other cracker in your mouth and chew it but do not swallow. Time how long it takes for you to taste sweetness. Record the time in seconds. 5. Explain the reasons for the difference in time to taste the sweetness of the non-chewed cracker to the chewed cracker. Part B: Lipid Emulsification 1. Obtain a glass and add approximately 2 tbsp of water to it. Add to this 2 tbsp. of vegetable oil. Take a picture of the mixture. 2. Place plastic wrap over the opening of the glass, hold tight and shake vigorously for 15 seconds. 3. Allow the mixture to stand for 2 minutes. Describe what happens to the oil and water. Take a picture of the mixture. 4. Add 2 – 3 drops of red food coloring Cover with the plastic wrap and shake vigorously for 15 seconds. Allow the mixture to stand for 2 minutes. Describe what happens to the oil and water. Take a picture of the mixture. 5. Add 1/2 tsp. of liquid detergent. Allow to stand for 1 minute Describe the oil, water, and detergent. Cover with the plastic wrap and shake vigorously for 15 seconds. 6. Allow the mixture to stand for 2 minutes. Describe what has happened. Take a picture of the mixture. 7. Allow the solution to stand for 15 minutes. Describe what has happened to the solution Results Answers to your experiment questions and the photos will comprise the Analysis/Data section of your lab report. the plastic wrap and shake vigorously for 15 seconds. 6. Allow the mixture to stand for 2 minutes. Describe what has happened. Take a picture of the mixture. 7. Allow the solution to stand for 15 minutes. Describe what has happened to the solution. Results Answers to your experiment questions and the photos will comprise the Analysis / Data section of your lab report, Submission Create your lab report using word processing software, such as Microsoft Word and save it to your computer as a .doc, .docx, or rtf file. This assignment requires a file upload submission. After you have reviewed the assignment instructions and rubric, as applicable, complete your submission by selecting the Submit Assignment button next to the assignment title. Browse for your file and remember to select the Submit Assignment button below the hile to complete your submission Review the confirmation annotation that presents after submission This lab will be graded using the Hands-on Lab Report Rubric. Please use it as a guide toward successful completion of this lab. in viruses. Unless you need to edit, it’s safer to stay in Protected View. Enable Editing 2 Lab Report Student Name: Lab X: Title Purpose Hypothesis Experiment Materials: Procedures: Analysis / Data Hypothesis Experiment Materials: Procedures: Analysis / Data Conclusion
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