Term
| Nonspecific defense mechanisms |
|
Definition
| directed against all pathogens and foreign substances; first line of defense against invasion |
|
|
Term
| Nonspecific defense mechanisms: Barriers |
|
Definition
Mechanical such as skin and mucus membranes
Chemical such as stomach acid and tears
Relexes such as sneezing |
|
|
Term
| Nonspecific defense mechanisms: Chemical Action |
|
Definition
Complement: promote phagocytosis and inflammation
Interferon: produced by virus infected cells to provide protection for neighboring cells |
|
|
Term
| Nonspecific defense mechanisms: Phagocytosis |
|
Definition
| neutrophils and macrophages |
|
|
Term
| Nonspecific defense mechanisms: Inflammation |
|
Definition
| characterized by redness, warmth, swelling, and pain |
|
|
Term
| Specific defense mechanisms |
|
Definition
| programmed to be selective (specificity); ability to remember invading agent (memory); invading agent called antigen; B-lymphocytes produce antibodies that react with the antigen |
|
|
Term
| Acquired Immunity: Active natural immunity |
|
Definition
| results when a person has a disease |
|
|
Term
| Acquired Immunity: Active Artificial Immunity |
|
Definition
| results when a specific antigen is deliberately introduced into a person - immunization |
|
|
Term
| Acquired Immunity: Passive natural immunity |
|
Definition
| when antibodies are transferred from one person to another - such as mother to child |
|
|
Term
| Acquired Immunity: Passive Artificial Immunity |
|
Definition
| when antibodies that developed in another person or animal are injected into a person |
|
|
Term
|
Definition
| acquired through normal activities |
|
|
