Biology

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  • Created by: EleAC
  • Created on: 01-06-16 11:56
Non-Specific Defences
Mechanisms that don’t distinguish between one type of pathogen or another e.g. skin
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Specific Defences
Mechanisms that do distinguish between different pathogens e.g. lymphocytes
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Phagocytosis
Pathogens are engulfed into vesicles (called phagosomes) and broken down by enzymes
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Antigens
Part of an organism that is recognised as non-self and triggers an immune response (usually they are proteins)
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Cell-mediated Immunity
T lymphocytes recognise antigen-presenting cells that have been invaded and undergo mitosis to respond
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Humoral Immunity
Immunity involving B cells and antibodies
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Antigenic Variability
Viruses such as flu have many different strains with different antigens on them
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Antibodies
Proteins synthesised by B cells, consisting of heavy and light chains and variable and constant regions
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Antigen-Antibody Complex
Formed when antigens bind to a specific site on the antibody
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Complementary Shape
Antigens have a shape that means they fit into their specific antibody
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Passive Immunity
The introduction of antibodies from an outside source
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Active Immunity
Stimulation of antibody production by the individual’s own immune system
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Monoclonal Antibodies
Isolation and cloning of a single type of antibody
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Vaccination
The introduction of a substance into the body with the purpose of stimulating active immunity against a particular disease
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Herd Immunity
Vaccinating most of a population so that no-one has the disease and transmission is stopped
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Other cards in this set

Card 2

Front

Mechanisms that do distinguish between different pathogens e.g. lymphocytes

Back

Specific Defences

Card 3

Front

Pathogens are engulfed into vesicles (called phagosomes) and broken down by enzymes

Back

Preview of the back of card 3

Card 4

Front

Part of an organism that is recognised as non-self and triggers an immune response (usually they are proteins)

Back

Preview of the back of card 4

Card 5

Front

T lymphocytes recognise antigen-presenting cells that have been invaded and undergo mitosis to respond

Back

Preview of the back of card 5
View more cards

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