First Aid Immunity Flashcards
Innate Immunity
Receptors recognize germ line encoded pathogens
Fast non specific response
Neutrophils Macrophages Dendritic Cells Natural Killer cells Complement
Adaptive immunity
V(D)J recombination
slow response
Faster with memory
T cell
B cells
Circulating Antibody
NK Cells
induce apoptosis of virally infected cells
B cell Function
Make antibodies
Opsonize bacteria
Neutralize Viruses
Activate compliment
Sensitize mast cells
B cell fx/ IgM, IgG
Activate compliment
B cell fx/ IgG
opsonize bacteria, neutralize viruses
B cell fx/ IgE
sensitize mast cells
T cell Fx
CD4 + T cells help B cell make antibody and produce cytokines
FAB
antigen binding fragment
Determines Idiotype
Fc
Constant Antibody region
Antibody diversity
Random VJ (light)or VJD recombo Addition of nucleotides during recombo
IgG characteristics
Main antibody
Most abundant
Crosses Placenta
IgG Functions
Delayed (2) response
- opsonizes bacteria
- neutralizes bacterial Toxins
IgA
Prevents attachment of bacteria and virus to mucous membrane
Found in secretions
IgM
Immediate (1) response
Fixes complement
Pentamer shape