T Level Health, Core B core science concepts. Template adapted from Canva.com.
B1.18 The definition of an antigen and an antibody:
• antigen - a substance that is recognised by the immune system as self or non-self and stimulates an
immune response
• antibody - a blood protein produced in response to, and counteracting, a specific antigen
B1.19 The link between antigens and the initiation of the body’s response to invasion by a foreign
substance:
• antigens as chemical markers found on the surface of cells
• ability of the body to recognise self and non-self-antigens
• recognition of non-self-antigen leading to the initiation of an immune response
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