Antibodie functions

Question 1

Antibodies do not destroy antigens; they () and tag them
-Form antigen-antibody (immune) complexes
-Defensive mechanisms used by antibodies
-()
-Agglutination
-()
-() fixation

Answer 1

inactivate
Opsonization
Neutralization
Complement

Question 2

() Antigen is inundated with antibody molecules
Allows for easier phagocytosis

Answer 2

opsonization

Question 3

Antibodies can bind same receptor on two different antigens at the same time
Allows for antigen-antibody complexes to become cross-linked into large clumps
Example: clumping of mismatched blood cells

Answer 3

agglutination

Question 4

-Antibodies block specific sites on viruses or bacterial exotoxins
-Prevent antigens from binding to receptors on tissue cells
-Antigen-antibody complexes undergo phagocytosis

Answer 4

neutralization

Question 5

Main antibody defense against cellular antigens (bacteria, mismatched RBCs)
When several antibodies are bound close together on same antigen, complement-binding sites on their stem regions are aligned
-Complement binds to antibodies
-Leads to formation of (/) Complex (MAC) & cell lysis/death

Answer 5

Complement fixation
Membrane Attack