Chapter 13

3. these cells actively secrete antibodies
7. have antibody receptors (BCRs)
9. these cells “record” information to fight pathogen if it comes back
13. treating a patient with antibodies against a particular pathogen for immediate effect against pathogen
14. is necessary for the T cell to participate in the adaptive immune response
15. host proteins displaying antigen fragments on the cell surface
16. these T cells recognize antigen presented via MHC II or MHC I and express CD4 or CD8
17. have T cell receptors (TCRs)

1. first recorded attempt at immunization occurred in sixth-century in this place
2. are the key players of adaptive (acquired) immunity
4. The V regions of the α and β chains together form an___ site of the TCR
5. thought to use cowpox to prevent smallpox
6. reduce the prevalence and impact of many infectious diseases that were once common and deadly
8. these T cells recognize antigen presented via MHC I and express CD8
10. are substances that can elicit a response from a B or T cell
11. is where the antibodies, rather than B cells themselves, defend against pathogens
12. lymphocytes enter the circulation and peripheral lymphoid organs where they survey for invading pathogens and/or tumor cells