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Flashcards in The Immune System Deck (12)
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1

The immune system

Guards the body against possible infections

2

Mon-specific défenses

Things that can guard against many types of threats.
Eg. Skin, mucous membranes, phagocytic cells (swallow bacteria and virus)

3

Pathogen

Disease causing agent

4

Specific défense

Deals with 1 type of threat.
Immune system sends weapons specifically for that antigen.

5

Antigen

Protein, or some surface feature that the immune system learns to recognize as being foreign.

6

Eg of specific défenses

Killer T lymphocytes
B Lymphocytes
Helper T lymphocytes

7

Killer T lymphocytes

Recognizes a certain type of foreign cell or cancer cell.
They kill by bursting their targets.

8

B lymphocytes (plasma cells)

Make antibodies specific to 1 type of antigen. Antibody proteins fits a certain antigen like a lock and key. This prevents it from entering host cell.

9

Help T lymphocytes

Controls immune system by sending out chemical signals.

10

Types of vaccinations

Passive immunity
Active immunity

11

Passive immunity

Giving the patient pre-formed antibodies gives them immediate protection, but the protection is short-lived

12

Active immunity

Injecting the patient with antigens, their immune system will learn about this certain pathogen. Days or weeks later, your body will develop ability to protect itself from disease.
Not immediate, but my protect for your lifetime