Across
- 5. A "tag" on the outside of a cell identifying it
- 7. These cause vasodilation and increased capillary permeability as part of the inflammatory response
- 9. The first responders to an infection site
- 10. Interferes with virus replication
Down
- 1. Leads artificial active immunity
- 2. Filters blood, traps pathogens, and removes old red blood cells
- 3. Natural _____ cells survey and then kill pathogens indiscriminately
- 4. An important step of activation that only happens on the first exposure
- 6. Promotes T cell development
- 8. _______ T cells that attack class 1 MHC cells