Examlex
-Which of the above molecules is a phenol?
Antigens
Antigens are substances, often on the surface of pathogens, that are recognized by the immune system, triggering an immune response.
Antibodies
Protein molecules produced by the immune system in response to antigens, which they specifically bind to neutralize or destroy.
Erythrocytes
Red blood cells, which carry oxygen from the lungs to the rest of the body and return carbon dioxide for exhalation.
Leukocytes
White blood cells that are part of the body's immune system, helping to fight infection and other diseases.
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