Across
- 2. Chemicals that recruit other immune system cells to site of infection
- 4. Mainly produced by helper T cells and natural killer cells
- 5. Short-lived phagocyte
- 9. Special proteins that flow through the blood of immunized individuals
- 10. Type of T cell that prevents the overreaction of the immune system
- 13. Mixing and matching different B cell receptors
- 14. The most class of antibody in the blood
- 15. Doubling of daughter cells
- 16. C3a and C5a (contribute to anaphylactic shock)
- 17. Defense system that can adapt to protect against invaders
Down
- 1. Composed of about 20 different proteins that destroy invaders and send signals to other immune cells
- 3. Antibodies that bind to a virus while outside the cell
- 6. How immune cells recognize signals associated with microbial attack
- 7. Proteins that present antigens
- 8. Adding/Removing additional DNA bases to the light chain of the antibody molecule
- 11. Immunological defense system that all animals have
- 12. Constant region of an antibody that binds to receptors on cell surfaces