The Immune System

3. / Undergoing ______ can cause nausea, hair loss, and headaches.
5. / A protein that is shaped like the letter Y with two antigen-binding sites.
7. / Carbohydrates, proteins, and lipids on the surfaces of viruses, bacteria, and other pathogens that trigger responses by the immune system.
8. / Immunity against pathogens in the body fluids.
11. / Cancerous tumors.
12. / _______ are compounds that kill bacteria without harming the cells of humans or animals.
14. / Elevated body temperature that slows or stops the growth of pathogens.
15. / When allergy causing antigens attach themselves to mast cells, the activated mast cells release chemicals known as ______.
17. / When scientists create a weakened or mild form of a pathogen to produce immunity, they are creating a(n) ________.
19. / A nonspecific reaction to tissue damage caused by injury or infection.
20. / The conclusion that says infectious diseases were caused by microorganisms, or germs.
21. / Poisons that produce illness by disrupting bodily functions.
23. / Defense that attacks disease-causing agents.
24. / The immunity produced by a vaccine.
25. / A mass of growing tissue.
26. / Common overreactions of the immune system.
28. / When cancerous cells move about the body.
29. / Noncancerous tumors.

1. / Animals that carry disease causing organisms from person to person.
2. / _______ are some of the most dangerous pathogens spread from person to person by contact.
4. / Disease-causing agent.
5. / When the body attacks itself it produces a(n) _______.
6. / Scientists named proteins ______ because they interfere with the virus.
9. / Your body's most important nonspecific defense.
10. / Any change other than an injury that disrupts the normal functions of the body.
13. / The Greek physician Hippocrates noted that people who survived certain diseases had acquired ______.
16. / Uncontrolled cell growth and division.
18. / A series of guidelines used to identify the microorganism that causes a specific disease.
22. / Smooth muscles contract causing the passageways in the lung to reduce in size.
27. / When cells of the immune system are weakened by infection.