Chapter 7.5 Acquired Immunity Flashcards Preview

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Flashcards in Chapter 7.5 Acquired Immunity Deck (10):
1

When does immunity occur?

It occurs naturally through infection or is brought about artificially by medical intervention

2

What are the two types of acquired immunity?

Active and Passive

3

What is active immunity?

The individual alone produces antibodies against an antigen

4

What is passive immunity

The individual is given prepared antibodies via an injection

5

Describe active immunity

It sometimes develops naturally after a person is infected with a pathogen. It is often induced when a person is well to prevent future infection.

6

What does immunization involve?

The use of vaccines

7

Describe what antibody titer is

After a vaccine is given, it is possible to follow an immune response by determining the amount of antibody present in a sample of plasma.

8

What does active immunity depend upon?

The presence of memory B cells and memory T cells capable of responding to lower doses of antigen. Active immunity is usually long lasting, although a booster may be required after many years for certain vaccines.

9

Describe passive immunity

It occurs when an individual is given prepared antibodies or immune cells to combat a disease. It is temporary. It is sometimes used to prevent illness in a patient who has been unexpectedly exposed to an infectious disease.

10

Describe monoclonal antibodies

Every plasma cell derived from the same B cell secretes antibodies against a specific antigen. These are all monoclonal antibodies because all of them are the same type and because they are produced by plasma cells derived from the same B cell. One method of producing monoclonal antibodies is in vitro.