Overview of the Immune System Flashcards
immunity
a state of protection against foreign pathogens or substances
antigen
a substance that induces an immune response and interacts with the host’s immune response
immunogen
a substance that triggers an immune response and interacts with THAT response
4 important details about innate immunity
- front line of defense
- takes minutes to hours
- nonspecific
- two branches
- immediate innate
- early induced innate
immediate innate immunity
- anatomical barriers
- skin, mucous membranes
- physiological barriers
- temperature, pH, enzymes
early induced immunity
- inflammation
- soluble factors
- compliment factors
- phagocytosis
- cytotoxic cells
7 important details about adaptive immunity
- second line of defense
- slow
- ~5-7 days
- very specific
- diverse
- immunological memory
- self/non-self recognition (tolerance)
- two branches
- humoral
- cell mediated
humoral immunity is from what
B cells
T/F B cells can recognize free antigens while T cells cannot
True
clonal expansion
when a B cell finds its antigen it divides into a memory cell and a plasma cell
memory cell
a B cell that still has its antibodies attached
plasma B cell
a B cell that has released its antibodies
cell mediated immunity is from what
T cells
T cells only recognize what type of antigens
intracellular
how is a T cell activated
an antigen is presented to the T cell
