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16 Cards in this Set

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Lysozyme
enzyme that digests cell walls of many bacteria and destroys microes entering upper respiratory system and openings around the eyes
Phagocytosis
ingestion of invading particles by certain types of white blood cells
Neutrophils
phagocytic cells that comprise about 60-70 percent of allow white blood cells
Basophils
white cells contain histamine, and mast cells contain histamine as well. Injury to these cells releases histamine which triggers vasodilation and makes capillaries leakier
Key festures of Immune system
-specificity
-diversity
-memory
-sel/nonself recognition
epitope
the localized region on surface of an antigen through which antibodies recognize antigens
How antibodies work
-Neutralization
-Agglutination
-Antigen-Antibody Complexes
perforin
a protein that form lesion in infected cell's membrane
Opsonization
complement proteins attach to foreign cells and stimulate phagocytes to ingest those cells
Immune system's capacity to distinguish self from nonself is
critical in blood transfusion and transplantation
ABO blood groups
allow for self recognation of blood; can identify is placed in body of another individual
Autoimmune disease
immune system reacts against itself
Allergy
hypersensitivity of body's defenses to environmental antigens called allergens.
Anaphylactic shock
when mast cell degranulationtriggers dilation of peripheral blood vessels and casues precipitous drop in blood pressure
Immunodeficiency
condition where individual is deficient in humoral or cell-mediated immune defences
T dependent
slower, more efficient, creates memory cells