PRELIM 04 - Immunology Flashcards
The ability to ward off disease caused by microbes or their products and to protect against environmental agents
Immunity
Refers to a lack of immunity
Susceptibility
Response generated against a potential pathogen
Immune response
Immediate, nonspecific, lacks immunologic memory, and is the first line of defense (Type of immunity)
Innate immunity
Responds rapidly to 2nd exposure, specific, has immunologic memory, and is the second line of defense (Type of immunity)
Adaptive immunity
Are cells that includes granulocytes and monocytes
Phagocytes
Ingestion of a microorganism or other substance by a cell
Phagocytosis
System that includes the population of cells that descend from monocytes
Reticuloendothelial system
Are cells that are residents in certain tissues and organs of the body
Fixed macrophages
Are cells that roam the tissues and gather at sites of infection/inflammation
Free macrophages
A system consisting of a fluid, vessels, and structures and organs containing lymphoid tissue
Lymphatic system
Lymphatic organs where stem cells divide and become immunocompetent
Primary lymphatic organs
Lymphatic organs where most immune responses occur
Secondary lymphatic organs
An organ that is a site of activation of T and B cells
Lymph nodes
System that consists of >30 proteins produced by the liver that circulate in the blood and within tissues
Complement system
3 pathways of the complement system that all end in the activation of C3
Classical, Alternative, Lectin
A non-specific, defensive response of the body to tissue damage
Inflammation
5 cardinal sign and symptoms of inflammation
Redness, Heat, Pain, Swelling, Loss of function
Inflammation that develops rapidly and last for a few days or weeks
Acute inflammation
Inflammation that develop slowly and last up to several months or years
Chronic inflammation
Abnormally high body temperature due to resetting of the hypothalamic thermostat
Fever
A symptom that intensifies the effect of interferons and may help tissue repair
Fever
A family of cytokines that inhibit viral replication
Interferons
3 types of interferons
Alpha, Beta, Gamma
Type of immunity that has the ability to differentiate between normal “self” cells and “nonself”
Adaptive immunity
The process by which a lymphocyte proliferates and differentiates in response to a specific antigen
Clonal selection
2 types of clonal cells
Effector, Memory
Type of clonal cells that destroys or inactivates the antigen
Effector cells
Type of clonal cells that rapidly responds to the antigen during 2nd exposure by rapid clonal selection
Memory cells
A substance recognized as foreign and provoke immune responses
Antigen (Ag)
A protein produced in response to an antigen
Antibody (Ab)
The ability to provoke an immune response by stimulating the production of specific antibodies, the proliferation of specific T cells, or both
Immunogenicity
The ability of the antigen to react specifically with the antibodies or cells it provoked
Reactivity
Part of the antigen that triggers immune responses and reacts with antibodies
Epitope/Antigenic determinant
LMW compounds that are antigenic when attached to a carrier molecule; has reactivity but no immunogenicity
Haptens
Are self antigens; help T cells recognize that an antigen is foreign, not self
Major histocompatibility complex (MHC)
Other name for major histocompatibility complex (MHC)
Human leukocyte antigen (HLA)
2 types of major histocompatibility complex (MHC) antigens
MHC-I, MHC-II
Type of MHC antigen present in all body cells except red blood cells
MHC-I