Across
- 3. a protective defense where antibodies are produced by another individual
- 4. the defenses that arise when a pathogen infects the body
- 6. a type of white blood cell that can kill tumor cells and virus infected cells as part of innate immunity
- 9. a protein that helps defend against pathogens
- 11. a lymphocyte that has undergone clonal selection and is capable of mediating an adaptive immune response
- 13. the first immune response in which memory cells are first formed
- 15. a much stronger and more effective response of the immune system due to the recognition by memory cells
Down
- 1. a host protein that functions in antigen presentation
- 2. an organism or virus that causes disease
- 5. long-lived lymphocytes formed during a primary immune response that can give rise to effector cells if the same antigen is later
- 7. a form of defense common to all animals active immediately upon exposure to pathogens
- 8. a vertebrate-specific defense that is mediated by B and T cells that exhibits specificity memory and self and non-self recognition
- 10. a type of white blood cell that mediates immune responses. the two man classes are b cells and t cells
- 12. enables an animal to avoid or limit many cellular infections
- 14. any substance that elicit a response from a b cell or a t cell