differentiate self from nonself, destroy harmful pathogens
innate, acquired immunity
proteins made by infected cells alerting presence of virus
what is special about nk cells
only phagocyte in innate system to kill other human cells that dont produce MHC 1 protein
best phagocyte to activate acquired immunity
cascade of bio rxn that lyses bad cells
what needs for inflammatory response
histamines by mast cells (basophils)
(antibody generator) sth that causes immune system to ID a pathogen and create antibody (protein) against it. producex by B cells.
T and B cells both
grow in the bone marrow but T matures in the thymus gland, B, the same bone marrow.
when phagocytes eat and shred up and present parts of foregin protein for Helper T cell to recognize
3 antigen presenting cells
dendriti, macrophage, b cell
plasma cells T and B cells
plasma T cells just go around signaling other lymphocytes to take action.
Plasma B cells actually pump out tons of antibody
how does helper T cell notify other lymphocytes?
secrete cytokines that activate B cells and cytotoxic t cells
When an antigen is bound to a Class I MHC molecule, it can stimulate a
When an antigen is bound to a Class II MHC protein, it can activate a
helper T cell
MHC (major histocompatibility complex) Class II molecules are a family of molecules normally found only on
antigen-presenting cells and lymphocytes.