Class 10 - Immunity Flashcards
innate immunity
first line of defense that is present at birth
passive immunity
antibodies are passed on
active immunity
body develops its own antibodies
humoral response
antibody mediated immunity
cell-mediated response
immune responses that are initiated through cell specific antigen recognition by T-cells
cytokines
soluble factors secreted by WBC’s that act as messengers between the cell types
interleukins
mediate communication between cells
B-lymphocytes
come from bone marrow; involved in humoral immunity; produce antibodies
T-lymphocytes
from thymus; involved in cell-mediated immunity;
antigen
proteins that elicit an immune response
antibody
used by the body to identify and neutralize foreign objects
immunoglobulin
another word for antibody
immunocompromised
unable to produce an active immune response
immunosuppressed
reduced ability to fight infections and other diseases
immunocompetent
body’s immune system can identify and inactivate or destroy foreign substances
neutropenia
low count of neutrophils
absolute neutrophil count
estimate of the body’s ability to fight infections; measures the number of neutrophils
leukopenia
decrease in leukocytes
leukocytosis
increase levels of leukocytes
atopic
inherited tendency to become sensitive to environmental allergens
anaphylaxis
severe allergic reaction where atleast 2 body systems are involved
hemolytic reaction
reaction after blood transfusion
allergic response
immune system overreacts
auto-immune disorder
impairment of one or more immune mechanisms
delayed hypersensitivity
type 4 response; sensitized T-lymphocytes attack antigens or release cytokines that attract macrophages causing tissue damage
cytotoxic/cytolytic
type 2 response; direct binding of IgG and IgM antibodies to an antigen = target cells are frequently destroyed
live vaccine
live virus is injected
inactivated vaccine
inactive virus is injected
