immune system mimic test
b cells
produce antibodies
how does HIV affect the body
Infects & kills T cells so your body cannot fight off disease
what is the purpose of MHC
distinguish self from non-self and identify cancer cells
macrophages
engulfs/digests debris, foreign substances
which cells respond whether yu have a viral infection or bacterial infection
helper t-cells
whats the difference between cell mediated and humoral immunity
humoral uses antibodies to kill pathogens and cell mediated uses killer t cells
cytotoxic T cells
kills cancer cells, virus infected cells, etc
which cells and which signaling molecule are responsible for initiating an inflammatory response
mast cells, histamines
what cell types are responsible for initiating a secondary immune response(second exposure)
memory cells
natural killer cells
A type of white blood cell that can kill tumor cells and virus-infected cells; without stimulation of antigen
what happens when a mammalian immune system encounters a pathogen
1. antigenic determinants from pathogen bind to antigen receptors on lymphocytes 2. lymphocytes specific to antigenic determinants from pathogen multiply 3. lymphocytes secrete antibodies 4. pathogen dies 5. memory cells remain
list 5 ways antibodies fight disease in your body
1. neutralize-stop spreading 2. agglutination- clump together 3. opsonization-find pathogens 4. compliment activation-punch holes in bacteria by work with proteins 5. enhance killer cells activity
what is made in bone marrow
B and T cells
what are antigens
a toxin or other foreign substance that induces an immune response in the body, especially the production of antibodies.
helper t cells
activate b cells and killer t cells
clonal selection
reproduction of identical ceels to fight a specific pathogen
what is passive immunity
short term immunity using antibodies produced outside the body(mom to child)
active immunity
the immunity that results from the production of antibodies by the immune system in response to the presence of an antigen. (actually fighting the virus)
what is the purpose of the thymus
trains and develops T-cells
