Immunity

2. immunity refers to destruction of antigens by antibodies
4. proteins that act as messengers to help regulate some functions of lymphocytes and macrophages during the immune response and some are given by injection to treat certain diseases
6. the causative agent is diluted to reduce its virulence (strength) so the recipient will form antibodies without becoming ill
11. This type of adaptive immunity is attained through natural or artificial sources
12. the major component of secretions
13. immunity is the final line of defense against disease, allows the body to recognize and respond to foreign substances
15. a protein substance the body produces in response to an antigen
17. Protein made by several types of cells, inhibits virus production and infection
18. considered a central or primary lymphoid organ

1. is a group of inactive proteins normally present in the blood
3. immunity that is inherited or genetic
5. Any foreign substance or molecule entering the body that stimulates an immune response
7. phyagocytic cells
8. believed to function as an antigen receptor, present in the blood in very small amounts.
9. weakens a person's immune system so it has a very hard time fighting diseases
10. the only antibody transferred from mother to fetus across the placenta
14. the cornerstone of the immune system
16. responsible for immediate-type allergic reactions
17. antibody produced on initial exposure to an antigen