Final Exam Flashcards
(230 cards)
Heavy Chain
Part of the antibody structure, has more amino acids and held my covalent bonds
Light chain
part of the antibody structure, smaller/less amino acids, held by covalent bonds
Constant region
Part of the antibody structure that remains the same, determines the antibody class
Variable region
The region that is different on the antibody that determines the specificity
Antibody specificity
what specific epitope is there that will allow the one antigen to bind to the antibody
Immunological tolerance
destroy the ones that could cause autoimmunity, random variable regions may make anti-self antibodies
use tolerance, deletion, anergy, and peripheral tolerance
only B-cells binding non-self survive & function
if B-cells can tolerate their own cells
Clonal deletion
B-cells bind before antigens present –> apoptosis
Is getting rid of everything that is not tolerant
Clonal anergy
B-cells bind before antigen present lose function
risk that it could become active again and give autoimmune
may stimulate but lose ability to respond
Peripheral tolerance
B-cells binds without T-helper cells –> apoptosis
if it doesn’t receive the second signal it will die (shut down)
Fc
Constant region on protein
IgD
only found on B-lymphocytes
Monomeric B-cell antigen receptor
held in a plasma membrane with a pointy side out, change shape will activate the cell
they are never secreted, when it binds to matching antigen it will activate cell, they will then divide to give memory & plasma cell clones
IgM
deals with blood type (ABO)
monomer in the B-cell membrane acts as an antigen receptor
like IgD when antigen binds it activates B-cell
IgM is secreted as a pentamer, 1st antibody in primary response, includes anti-ABO antibodies, can’t cross placenta (too big), does not give passive immunity
IgG
main blood antibody 80% of antibodies
whorks by neutrilizing toxins & opsonization
major antibody of late primary & secondary responses
monomer that includes anti-Rh antibodies
cross placenta to provide fetus/newborn immunity
IgA
13% of antibodies
dimer, secreted in mucus, milk, tears, saliva
IgE
0.002%
antibody of allergy & antiparasitic activity
monomer, signals basophils & mast cells to stimulate inflammation
Activation
Antigen binds B-cell membrane IgM or IgD recptor
the B-cell phagocytoses surface antibody w/ its antigen
then it will display and digest fragments on surface MHC-II
Memory cell
plasma cells that turn into memory cells for later
Neutralize
cover toxins & virus binding sites
keeps virus form getting into cell, blocking from moving forward
Complement
Precipitate
bind over and over by cross linking with antibodies they will get bigger until they fall out of solution
Primary response
slow, since few responsive cells ready
Secondary response
rapid since menay memory cells
Active immunity
you own cells responding & secreting antibody
Passive immunity
others antibodies from breast feeding milk, covalescent plasma, RhoGam