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Description 1 attachments Slide 1 of 1 attachment_1 attachment_1 UNFORMATTED ATTACHMENT PREVIEW >]}>\)))))$$ HOL - Instance (/#/home) 5/17/23, 6:41 PM Home (https://myhol.holscience.com) My Account (https://myhol.holscience.com/users/152844) Help Center (//studenthelp.holscience.com) Logout (https://myhol.holscience.com/logout) - ? BIOL104_300-Biology of Human Life ? Kit Code Spread of Contagion EXPLORATION ? EXPERIMENTATION ? EVALUATION ? - Exercise 2 Modeling Disease Transmission In this exercise, you will use chemical solutions to simulate the transmission of a microorganism that is a vector of disease. Note: It is suggested that you perform this experiment with a minimum of one and a maximum of seven assistants who are able to follow the exact directions you will give them. If no assistants are available, the lab may be performed alone. Procedure 1 Read each of the following steps before beginning. 2 Locate the 8 clear plastic 9 oz. cups provided in your kit and place the cups in a line. 3 Pour the entire 30-mL bottle of sodium hydroxide (NaOH) into the ?rst cup. The NaOH will act as the disease-causing microorganism. 4 Use the tablespoon-size measuring spoon to add exactly 2 tablespoons of distilled water to each of the remaining 7 cups. 5 Warn your assistant(s) that any of the cups may contain a strong base, NaOH. They must be very careful in handling all solutions. 6 Have an assistant rearrange the cups without anyone else watching. Rearrange the cups yourself so that no one knows which cup holds the pathogen. 7 Form a hypothesis about the number of cups that will contain the “disease-causing https://myhol.holscience.com/instances/28797#/experimentation/359920/exercise/69908 Page 1 of 5 5/17/23, 6:41 PM > HOL - Instance 7 Form a hypothesis about the number of cups that will contain the “disease-causing microorganism” at the end of this experiment. Record the hypothesis in Data Table 3 3. 8 Make the following announcement to the assistant(s): “The following activity will simulate the spread of a disease-causing microorganism at a luncheon. One individual at the luncheon has contracted the disease within the previous 24 hours. However, this individual is unaware of the disease because they have not begun to exhibit symptoms. During the luncheon, many individuals are sharing and tasting the beverages and food. To simulate sharing of beverages at the luncheon, you will mix the beverage I am about to hand you with 3 different people. To mix beverages, carefully pour all of the contents of your cup into another person’s cup. The person with the full cup will then pour ½of their cup’s contents back into your cup. Share drinks with a total of 3 people. It is very important that no one actually drinks any of the “beverages.” Note: If you have only 1 assistant or are performing the exercise alone, this activity can be simulated by randomly mixing each beverage 1 time with 3 other cups, until each cup has been switched. 9 Have the assistant(s) begin the exercise, mixing the solutions. 10 When all solutions have been mixed, use scissors to snip off the tip of the phenolphthalein pipet. 11 Carefully dispense 3 drops of phenolphthalein into each cup. 12 Phenolphthalein will act as a test for the disease; pink indicates a positive test result. Identify which solutions test positive for the disease. Note: Phenolphthalein is an acid-base indicator which will change from colorless to pink at a pH between 8.2 – 10.0. In other words, phenolphthalein will turn pink in the presence of bases, such as NaOH. 13 Complete Data Table 3 3, answering each of the following: a The number of beverages at the luncheon. b The number of people who arrived at the luncheon with a contagious disease. c The percent of people who began the luncheon with the infectious disease; this is the number of people who began the exercise with a contagious disease divided by the number of beverages. d The number of people who contracted the contagious disease by the end of the luncheon. -> e The percent of people who contracted the contagious disease; this is the number of https://myhol.holscience.com/instances/28797#/experimentation/359920/exercise/69908 Page 2 of 5 5/17/23, 6:41 PM -> HOL - Instance - The percent of people who contracted the contagious disease; this is the number of people who ended the exercise with a contagious disease divided by the number of beverages. Need Help? e Cleanup: Discard the contents of each cup by pouring the liquids down the drain with copious amounts of cold tap water. Wash the cups with dish soap and tap water, allow them to dry, and return all items to the kit for future use. Exercise 2 - Questions Question 1 How did the results of the experiment compare to your hypothesis? B I U ? ? ? ? 0 Word(s) Question 2 Imagine you are one of the people who left the luncheon with a contagious disease and interacted with an average of 9 different people each day. How many people could potentially be infected in 7 days? B I U ? ? ? ? 0 Word(s) ? Data -> https://myhol.holscience.com/instances/28797#/experimentation/359920/exercise/69908 Page 3 of 5 5/17/23, 6:41 PM -- HOL - Instance Question 3 Imagine the other remaining persons who received the contagious disease at the end of the luncheon interacted with an average of 6 different people per day. How many people could potentially be infected in 7 days by these others who left the luncheon? B I U ? ? ? 0 Word(s) ? Question 4 If the contagious individual at the mock luncheon had not shared beverages or food, might others still have contracted the disease- causing microorganism? B I U ? ? ? 0 Word(s) ? Question 5 How can the spread of disease-causing microorganisms be prevented through regular hand washing and cleaning of shared surfaces? B I U ? ? ? 0 Word(s) ? ? Previous Next ? -> https://myhol.holscience.com/instances/28797#/experimentation/359920/exercise/69908 Page 4 of 5 Purchase answer to see full attachment Explanation & Answer: 5 Questions User generated content is uploaded by users for the purposes of learning and should be used following Studypool's honor code & terms of service.