How do pathogens cause a immune response in the host?

Question 1

Antigen

Answer 1

• Unique molecule or part of a molecule e.g., a virus, part of a bacterium, pollen, part of a toxic molecule = that initiates an immune response

Question 2

Non-Self Antigen

Answer 2

• Originates from outside the body.
• Is a marker on cells, tissues, or organs?
• The body’s immune system recognizes this material as foreign

Question 3

Self-Antigen

Answer 3

• Marker molecules on the surface of cells that are recognised as being part of the organism.