Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
29 Cards in this Set
- Front
- Back
|
Active immunity |
Immunity that results when the body manufactures its own antibodies or T cells against a pathogen |
|
|
Allergen |
Environmental substance that triggers an allergic response |
|
|
Anaphylaxis |
Severe, immediate hypersensitivity reaction affecting the entire body |
|
|
Antibody |
Substance produced by B lymphocytes in response to a specific antigen |
|
|
Antigen |
Any molecule that triggers an immune response |
|
|
Cellular immunity |
Immune response that targets foreign cells or host cells that have become infected with a pathogen |
|
|
Lymph |
Clear, colorless fluid filling lymphatic capillaries |
|
|
Lymph nodes |
Kidney-shaped masses of lymphatic tissue that lie along lymphatic vessels |
|
|
Macrophage |
Important phagocyte that remains fixed in strategic areas |
|
|
Natural killer cells |
Unique group of lymphocytes that continually roam the body seeking out pathogens or diseased cells |
|
|
Neutrophils |
Phagocytes that accumulate rapidly at sites of acute injury |
|
|
Nonspecific immunity |
First and second lines of defense; immune response aimed at a broad range of pathogens |
|
|
Passive immunity |
Immunity that results when someone receives antibodies from another person or animal |
|
|
Phagocytosis |
Process by which phagocytes engulf and destroy microorganisms |
|
|
Pyrexia |
Fever |
|
|
Specific immunity |
The third line of defense; immune response targeted at a specific pathogen |
|
|
Chemotaxis |
The movement of white blood cells to an area of inflammation in response to the release of chemicals from the injured cells |
|
|
Spleen |
The body’s largest lymphatic organ; contains masses of lymphocytes |
|
|
T lymphocytes |
Lymphocytes that participate in both cellular and humoral immunity; also called T cells |
|
|
Thymus gland |
Lymphoid organ where T cells mature; located in the mediastinal cavity |
|
|
Tonsils |
Masses of lymphoid tissue that form a protective circle at the back of the throat |
|
|
Complement |
A group of proteins in the blood that, through a cascade of chemical reactions, participate in nonspecific immunity |
|
|
Diapedesis |
Process in which neutrophils enzymatically digest a portion of the capillary basement membrane, allowing them to leave the vessel and enter inflamed tissue |
|
|
Histamine |
Substance secreted by injured or irritated cells that produces local vasodilation, among other effects |
|
|
Humoral immunity |
Immune response that uses antibodies to target pathogens outside the host cells |
|
|
Hyperemia |
Increased blood flow to an area |
|
|
Immunoglobulins |
Antibodies |
|
|
Inflammation |
An immunological response to injury, infection, or allergy, marked by increases in regional blood flow, immigration of white blood cells, and release of chemical toxins |
|
|
Interferon |
Protein released from virus-infected cells that helps protect nearby cells from invasion |
