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Parasitology Exam 1 - Immune System
Parasitology, Immune System
42
Biology
Undergraduate 4
01/24/2011

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Term
Innate Defense
Definition
Does not require prior exposure to specific substance
Term
Acquired Defense
Definition
Requires prior exposure to a specific substance
Term
First Line of Defense
Definition
Physical barriers of the host
Term
Second Line of Defense
Definition
Innate, nonspecific defenses of host
Term
Third Line of Defense
Definition
Specific and acquired (immune system)
Term
Types of white blood cells
Definition
Neutrophils
Monocytes / Macrophages
Eosinophils
Lymphocytes
Natural killer cells
Basophils
Term
Neutrophil
Definition
Professional phagocyte
Kamakazi cells
First on scene
Non-specific action
Non-dividing
Granules contain hydrolytic enzymes
Term
Macrophage
Definition
Professional phagocyte
Killers and scavengers
Clean up crew
Long lived
Will divide at site
Term
Eosinophils
Definition
Cytotoxic cell
Granules that are toxic and hydrolytic
Anti-parasitic activity
Allergic response
Term
Natural Killer Cells
Definition
Non-specific
Cytotoxic
Defense against tumor cells and infected cells
Term
Inflammatory Response
Definition
Non-specific response
Triggered by tissue damage
Initiated by cytokines released by injury cells and white blood cells
Signs: redness, heat, swelling, pain
Term
Lesion
Definition
Any pathological change in tissue
Term
Pathology
Definition
Development of abnormal conditions and the structural and functional changes that result from the disease process
Term
Purulent Exudate
Definition
Pus: dead neutrophils, dead tissue, extravascular fluid
Term
Abscess
Definition
Pus-filled cavity
Lesion created by the inflammatory process
Term
Ulcer
Definition
Lesion open to the surface
Term
Granuloma
Definition
Accumulation of inflammatory cells, especially macrophages, around inflammatory causative agent
Accumulation becomes walled off by fibrous connective tissue isolating the causative agent
Term
Antigen
Definition
Any foreign molecule that elicits a specific immune response
Initiator and driving force of immune system
Term
Antibody
Definition
Proteins secreted by B cells in response to a specific antigen
Term
B Cells
Definition
Antibody producers
Stay in bone marrow
Term
T Cells
Definition
Include two major types: cytotoxic (defenders / killers) and helpers (facilitators)
Migrate to thymus
Term
Self Tolerance
Definition
Removal of all immune cells with receptors capable of reacting with self components
Term
Apoptosis
Definition
Programmed cell death through activation of proteases and nucleases
Term
Major Histocompatibility Complex
Definition
Found on cell membranes
Protein self markers that serve as a biochemical fingerprint
Antigen presenters to T lymphocytes
Not antigen specific
Term
Class I MHC Molecules
Definition
Found on all nucleated cells
Term
Class II MHC Molecules
Definition
Found on specialized cells such as B cells, Helper T cells, Macrophages, and Thymus cells
Term
Cell Mediated Immunity
Definition
Cytotoxic T cells are effector cells
Go after intracellular pathogens
Term
Humoral Immunity (Antibody Mediated Immunity)
Definition
B Cells are effector cells
Go after extracellular pathogens
Term
Cytotoxic T Cells
Definition
Contain MCH I receptor: CD8
Term
Helper T Cells
Definition
Contain MCH II receptors (CD4)
Term
IgM
Definition
First contact antibody
Term
IgG
Definition
Anamnestic (secondary) response antibody
Term
IgA
Definition
Secretory antibody
Term
IgD
Definition
Unknown Function
Term
IgE
Definition
Low percentage in circulation but always some present and attached to basophils and mast cells
Hight levels indicate parasites and allergies
Term
Epitope
Definition
Antigenic Determinant
Term
T Helper 1 Cell
Definition
Activate cell-mediated immunity
Can suppress humoral immunity
Term
T Helper 2 Cells
Definition
Activate humoral immunity
Can suppress cell-mediated immunity
Term
Plasma Cells
Definition
Effector B cells
Term
Opsonization
Definition
Phagocytosis induced by binding of antibody
Term
Active Immunity
Definition
Immune response involved
Time to develop with first contact
Memory
Naturally acquired
Vaccines
Term
Passive Immunity
Definition
Pre-formed (anti-venom)
Immune response not involved
Immediate protection
No memory
Administer each time
Natural (breast milk, placenta)
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