Definitions 7 Flashcards
What is anaphylaxis?
An acute allergic reaction to an antigen to which the body has become hypersensitive.
What is atrophy?
The degeneration of cells.
What is sensitization?
Exposure to an antigen such that further antigen exposure leads to recognition by the organism.
What is FcERI?
The high-affinity receptor for the Fc region of immunoglobulin E, an antibody isotype involved in allergy disorders and parasite immunity.
What is histamine?
Substance the immune system releases that causes the symptoms of allergies such as runny nose and sneezing.
What is hypersensitivity?
An overreaction of your immune system to something that would not usually cause an immune response.
What is a leukotriene?
Eicosanoid inflammatory mediators produced in leukocytes by the oxidation of arachidonic acid.
What is a mast cell?
A type of WBC that is found in CT all through the body, especially under the skin, near blood vessels and lymph vessels, in nerves, and in the lungs and intestines.
Release histamine, leukotrienes, and cytokines.
What is a blood typing card test?
The test to determine your blood group. Your blood is mixed with antibodies against type A and type B blood.
What is a cross-matching test?
Performed prior to administration of blood or blood products. The purpose is to detect the presence of antibodies in the recipient against the RBCs of the donor.
What is a natural antibody?
Germline encoded immunoglobulins found in individuals without known prior antigenic experience.
What is placental transfer of antibody?
The transfer of IgG across the placenta from the mother to the fetus.
What is an autoantibody?
Antibody produced by the immune system that is directed against one or more of the individual’s own proteins.
