Which statement best distinguishes an antigen from an antibody?
Correct answer: A. An antigen triggers a response, while an antibody binds the antigen
- A. An antigen triggers a response, while an antibody binds the antigen
- B. An antigen destroys pathogens, while an antibody forms platelets
- C. An antigen is a cell, while an antibody is a red blood cell
- D. An antigen prevents inflammation, while an antibody causes bleeding
Explanation
An antigen is a substance recognised as foreign or abnormal that can stimulate an immune response. An antibody is a specific immunoglobulin made by B lymphocytes or plasma cells that binds to that antigen.
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About Blood and Immunity
Blood and immunity covers plasma, red blood cells, white blood cells, platelets, haemoglobin, blood groups and haemostasis. It explains innate and adaptive defenses, antibodies, lymphocytes, inflammation, vaccination and immune memory, with a distinction between active and passive immunity and between antigen and antibody.
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