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What are antigens?
Molecules recognised by lymphocytes in the immune system
Where are antigens?
On the surface of cells
What does the immune system recognise?
Identical antigens that your body’s cells will have
What will identical antigens that your body’s cells have be?
Recognised by the immune system
Where are foreign antigens?
On the surface of pathogens
What are on the surface of pathogens?
Foreign antigens
What do foreign antigens do?
Trigger an immune response
What happens when foreign antigens have been detected?
Lymphocytes produce specific antibodies which can take days
When do lymphocytes produce specific antibodies?
When foreign antigens have been detected
What do antibodies do?
Bind to specific foreign antigens causing pathogens to stick together which are easier for phagocytes to engulf and destroy
What do some pathogens produce?
Toxins which make you feel ill
How do lymphocytes deal with toxins?
Produce specific antitoxins to neutralise toxins
Note 
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