Immunity

4. Another name for white blood cells
6. Foreign substances that trigger the immune response
9. Also known as hives
10. Increased number of white blood cell production
11. These disorders are caused when the body can't recognize self
12. Together these proteins make up the humoral immune response
13. Also known as seasonal allergies or hay fever (2 words)
17. Decreased number of white blood cells
18. Occurs when the immune system is unable to respond effectively
19. This type of immunity occurs when individuals receive antibodies from another person
21. Type 4 hypersensitivity
22. The body's natural or induced response to infection

1. Overreaction of the immune system
2. This type of hypersensitivity is called Immune complex-mediated
3. Type 2 hypersensitivity
5. These kind of infections usually don't affect people with intact immune systems
7. Acute systemic type 1 response
8. Largest lymphoid organ
13. This type of immunity results from a previous exposure to an antigen
14. Immune systems that effectively identify and destroy antigens
15. This type of immunity can occur through exposure to disease of through vaccination
16. This type of hypersensitivity is called IgE-mediated
20. Produces and stores hematopoietic stem cells (2 words)