secondary immune response Flashcards
1
Q
what is a secondary immune response?
A
- reinfected with same pathogen
- B memory cells rapidly produce antibodies
- pathogen destroyed before symptoms occur
2
Q
describe passive immunity
A
- antibodies introduced into the body
- memory/plasma cells not made
- no long term immunity
3
Q
what is an example of passive immunity?
A
breast milk to a baby
4
Q
describe active immunity
A
direct exposure to pathogen/antigen
5
Q
describe natural active immunity
A
following infection, the body creates its own antibodies
6
Q
describe artificial active immunity
A
- following introduction of a weakened pathogen or antigen via vaccine, body creates its own antibodies
- primary response triggered
- allows secondary response if reinfected
7
Q
what is herd immunity?
A
when the majority of a population are immune
8
Q
what are disadvantages of vaccination?
A
- pathogens genetic material can mutate
- produces a different shaped antigen (antigen variability)
9
Q
why is biodiversity so important?
A
most medicines are produced from plants and microorganisms
10
Q
give an example of active immunity
A
vaccination
11
Q
give an example of natural immunity
A
fetes receiving antibodies through placenta
12
Q
give an example of artificial immunity
A
vaccination
