Active and Passive Transport Immunity Flashcards
When is active immunity acquired
When an antigen enters the body, triggering a specific immune response
How is active immunity acquired naturally
Through exposure to microorganisms
How is active immunity acquired artificially
Through vaccination
How does active immunity work
The body produces memory cells, along with plasma cells, giving the person long-term immunity
How long does the antibody concentration in active immunity, during the primary response take to increase
One to two weeks
How long does the antibody concentration in active immunity, during the secondary response take to increase
A shorter time than primary response and increases far more
How is passive immunity acquired
Without an immune response
Are there memory cells produced in passive immunity and why/why not
There are no memory cells to produce antibodies, as the immune system has not been activated.
When does artificial passive immunity occur
When people are given an injection / transfusion of the antibodies.
How are antibodies for an injection/transfusion in artificial passive immunity collected
Collected from people who’s immune system had been triggered by a vaccination to produce antibodies.
When does natural passive immunity occur
Foetuses receive antibodies across the placenta. Babies receive the initial breast milk from mothers (the colostrum) which delivers an isotope of antibody IgA.
