1.   define disease as a failure of homeostasis and list examples of this.
2.   recognize that viruses, bacteria, fungi. and other organisms may invade other plants
      and animals interfering with their homeostasis.
3.   explain what is meant by the immune response.
4.   state the function of natural killer cells.
5.   define the term antigen.
6.   define the term antibody.
7.   explain how phagocytes and lymphocytes assist in the immune function.
8.   recognize that some white blood cells may mark antigens for attack by other
      white blood cells or antibodies.
9.   recognize that antibodies have specific shapes which allow them to attack specific
      antigens.
10. explain what is meant by immunity.
11. explain how receiving a vaccination or recovery from a disease may produce a primary and secondary immune response.
12. explain the difference between active and passive immunity and list some ways of getting each of these.
13. explain what an allergy is.
14. explain the difference between a histamine and an antihistamine.
15. explain what is meant by autoimmune diseases and list some examples of these.
16. discuss what AIDS is and explain how it destroys the immune system.
17. relate our knowledge of immunity to tissue transplantation and blood typing.
18. explain the role of lymph nodes in the immune process.
19. list 5 other causes of disease besides infections or parasitic attacks and list
      some examples of each of these causes.
20. explain what cancer is and how it interferes with homeostasis.
21. recognize that exposure of cells to certain chemicals and radiation increases the
      chance of having a mutation and getting cancer.
22. recognize that biological research may generate knowledge used to prevent,
      diagnose, treat, control, and cure diseases of plants and animals.