In this online scavenger hunt, you will explore how the human body protects itself from invaders through three lines of defense. You will be going to different websites to see videos, animations, and images and to read explanatory text that will give you information that you will need in order to answer a series of questions about the immune system and how it works. Be sure to write in your own words and use complete sentences. WRITE NEATLY!!!!
Biology: Immune System WebQuest
In this webquest, you will explore how the human body protects itself from invaders through three lines of defense. You will be going to different websites to see videos, animations, and images and to read explanatory text that will give you information that you will need in order to answer a series of questions about the immune system and how it works. Type your answers to the following questions. Be sure to write in your own words and use complete sentences.
Watch the first 2:40 of the following video that shows gives an overview of how the body protects itself from microbes and explains how the first and second lines of defense work.
http://www.youtube.com/watch?v=IWMJIMzsEMg
1. What are the body’s three defenses? How do they differ from each other?
2. How do the skin, sweat glands, mucus membranes, and acids in the stomach protect the body?
Watch the following video about natural killer cells.
http://www.youtube.com/watch?v=HNP1EAYLhOs
3. What are natural killer cells? What kinds of cells do they attack?
Watch the following podcast about the inflammatory response.
http://www.youtube.com/watch?feature=fvwp&v=_bNN95sA6-8&NR=1
4. When does the inflammatory response occur? Is it specific or nonspecific? What are three signs of the inflammatory response?
5. What cells release histamine? What does histamine do?
6. How do platelets play a role in the inflammatory response?
Watch the Bozeman podcast on The Immune System and answer the following questions.
http://www.youtube.com/watch?v=z3M0vU3Dv8E
7. Describe how a virus can spread throughout your body.
8. What is acne?
9. What is an “antigen”?
10. Explain what it means for a person to have specific immunity to an antigen.
11. What are lymphocytes and what are the two major classes of lymphocytes?
12. In what part of the body are each type created?
13. Explain the humoral response. What causes a humoral response? What kinds of cells and chemicals are involved?
14. What causes a cell-mediated response? What kinds of cells are involved? What is the role of a macrophage in the immune response?
15. What specific kind of cell is attacked by HIV? Why is this so damaging to the immune system? Be specific.
16. Explain how a person can be infected by a disease pathogen and not know it.
17. How do viruses and bacteria get around the immune system?
Read through this webpage for #18 and click on the leprosy link to answer question #19.
http://www.who.int/topics/infectious_diseases/en/
18. What are the four types of pathogens? Missing page on website. Instead, tell me the name of your favorite pet OR your favorite cartoon character.
19. What is Leprosy? Which of the four types of pathogens causes Leprosy? How prevalent is it today?
Use the following link to answer questions 20 – 21:
http://www.pbs.org/wgbh/evolution/library/10/4/l_104_03.html
20. Explain how bacteria become resistant to antibiotics.
21. What affect do antibiotics have on common colds?