SB5j Immune System Flashcards

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1
Q

activate

A

To make active, such as when a lymphocyte is triggered by a pathogen to start dividing rapidly.

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2
Q

antibody

A

A protein produced by lymphocytes. It attaches to a specific antigen on a microorganism and helps to destroy it.

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3
Q

antigen

A

A protein on the surface of a cell. White blood cells are able to recognise pathogens because of their antigens.

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4
Q

herd immunity

A

When the majority of people in a group are immunised, which provides protection to the few who are not by reducing their chance of meeting an infected person.

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5
Q

immune

A

When a person does not fall ill after infection, because their immune system attacks and destroys the pathogen quickly.

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6
Q

immunisation

A

Giving a vaccine that causes an immune response without the person becoming ill, and which will make the person immune to the pathogen.

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7
Q

lymphocyte

A

A type of white blood cell that produces antibodies.

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8
Q

memory lymphocyte

A

A lymphocyte that remains in the blood for a long time after an infection or vaccination.

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9
Q

MMR

A

Stands for measles, mumps and rubella. The vaccine given to develop immunity to these diseases.

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10
Q

secondary response

A

A much more rapid, and larger, production of antibodies to a pathogen when it infects the body again.

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11
Q

vaccine

A

A mixture containing weakened or inactive pathogens, or antigens from the pathogen. When put into the body it causes an immune response.

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