Chapter 34

2. Nodes / Structures that swell during infections as white blood cells multiply
4. / Cell that engulfs large particles or pathogens
5. Immunity / Immunity gained by exposure to disease or vaccines
11. Proteins / Molecules that mark pathogens for destruction and assist the immune response
13. Memory / Immune system’s ability to remember past invaders and respond faster
15. / White blood cells that send signals to other immune cells
16. Immunity / Immune system that learns and remembers specific pathogens
18. / Y-shaped protein that binds specifically to antigens
19. Immunity / Immunity received from another source, like mother’s milk or antibody injections
21. / Overreaction of the immune system to a harmless substance

1. / A weakened or missing immune response, which reduces the body’s defense
3. TCells / White blood cells that kill virus-infected cells
6. / Signaling proteins that help immune cells communicate and coordinate
7. / White blood cells that create antibodies
8. Immunity / Immune response involving antibody production by B cells
9. / Molecule that triggers an immune response
10. Immunity / General, non-specific immune defense present at birth
12. Immunity / Immune response involving direct attack on infected cells
14. / Large immune cell that engulfs invaders and activates adaptive immunity
16. Diseases / Conditions in which the immune system attacks the body’s own cells
17. / Substances that introduce antigens to stimulate immunity without causing illness
20. Cells / B cells that secrete antibodies during an immune response