Final answer:
The matching pairs key immune system terms with their appropriate cell types or processes, highlighting the roles of macrophages, PMNs, CTLs, and B cells in the immune response.
Step-by-step explanation:
The matching question provided is asking to associate terms related to immune function with specific cell types or processes. Here is the matching based on the provided reference material:
- A. Pathogens in vesicles - 3. Macrophages
- B. Major antigen presenting cell - 3. Macrophages
- C. Innate immunity - 2. PMN (Polymorphonuclear Neutrophils)
- D. Cytosolic pathogens - 1. CTL (Cytotoxic T Lymphocytes)
- E. CD 19 Ab - 4. B Cell
Macrophages process extracellular pathogens and present them with MHC class II molecules, which are recognized by CD4+ helper T cells. B cells can also present antigens to T cells necessary for certain antibody responses. CTLs are involved in the elimination of cytosolic pathogens, presenting antigens via MHC Class I to CD8+ T cells. Neutrophils (PMNs) are part of the innate immune system and responsible for phagocytosis of pathogens. CD19 is a marker associated with B cells important in humoral immunity.