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;
10 Cards in this Set
- Front
- Back
|
what is an antigen |
are substances that trigger specific immune respones. |
|
|
what makes an antigen effective? |
molecules that are large, usually complex, stable, degradable, and foreign to their host. |
|
|
what is an epitope |
is the three-dimensional shape of a region of an antigen that is recognized by the immune system |
|
|
name the three types of antigens |
1. endogenous 2. exogenous 3. autoantigen |
|
|
describe an endogenous antigen |
protozoa, fungi, bacteria, and viruses that reproduce inside a body's cells produce endogenous antigens |
|
|
describe exogenous antigens |
include toxins and other secretions and components of microbial cell walls, membranes, flagella, and pili. |
|
|
describe autoantigens |
antigenic molecules that belong to the host, if the immune cells attack these antigens then the patient has an autoimmune disease |
|
|
what is self-tolerance? |
the body does not attack antigens on the surface of its normal cells, called autoantigens. |
|
|
where are exogenous antigens found |
are found on microorganisms that multiply outside the cells of the body |
|
|
where are endogenous antigens produced? |
by pathogens multiplying inside the body's cells. |
