Chapter 13 Resource: Circulation and Immunity

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Name Date Class(continued)Hands-On ActivitiesData and ObservationsTable 1ApplesApple ObservationsNumberCondition Day 3 Day 71 Fresh2Untreated3Dropped4Rubbed with sandpaper5Washed with soap and water6Covered with alcoholConclude and Apply1. Infer How does this experiment relate to infections on your skin?2. Explain why it is important to clean a wound.Communicating Your DataPrepare a poster illustrating the advantages of washing hands to avoid the spread ofdisease. Get permission to put the poster near a school rest room. For more help, refer tothe Science Skill Handbook.Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.6 Circulation and Immunity
Name Date ClassDesign Your OwnBlood Type ReactionsLab PreviewDirections: Answer these questions before you begin the Lab.1. Which simulated blood type will be used as the control?Hands-On Activities2. Why is it important to NOT eat, taste, or drink laboratory materials?Human blood can be classified into four main blood types—A, B, AB, and O.These types are determined by the presence or absence of antigens on the redblood cells. After blood is collected into a transfusion bag, it is tested todetermine the blood type. The type is labeled clearly on the bag. Blood isrefrigerated to keep it fresh and available for transfusion.Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.Real-World QuestionWhat happens when two different blood typesare mixed?Form a HypothesisBased on your reading and observations, forma hypothesis to explain how different bloodtypes will react to each other.Safety PrecautionsWARNING: Do not taste, eat or drink anymaterials used in the lab.Possible Materialssimulated blood (10 mL low-fat milk and10 mL water plus red food coloring)lemon juice as antigen A (for blood types Band O)water as antigen A (for blood types A and AB)dropperssmall paper cupsmarking pen10-mL graduated cylinderGoals■ Design an experiment that simulates thereactions between different blood types.■ Identify which blood types can donate towhich other blood types.Test Your HypothesisMake a Plan1. As a group, agree upon a hypothesis anddecide how you will test it. Identify theresults that will confirm the hypothesis.2. List the steps you must take and the materialsyou will need to test your hypothesis. Bespecific. Describe exactly what you will do ineach step.3. Prepare a data table like the one in yourtext on a separate sheet of paper to recordyour observations.4. Reread the entire experiment to make sureall steps are in logical order.5. Identify constants and variables.Blood type O will be the control.Follow Your Plan1. Make sure your teacher approves your planbefore you start.2. Carry out the experiment according to theapproved plan.3. While doing the experiment, record yourobservations and complete the data table.Circulation and Immunity 7
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Chapter 13 Resource: Circulation and Immunity

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