Examlex
The quality of a researcher's operational definitions is closely associated with:
Foreign Antigen
A substance from outside the body that triggers an immune response when detected by the body's immune system.
Immune System
The immune system is the body's defense mechanism against pathogens, consisting of a network of cells, tissues, and organs that work together to protect the body from disease.
Extracellular Antigens
Foreign substances outside cells that stimulate an immune response.
Subpopulation
A distinct group within a larger population that can be identified by certain characteristics or behaviors.
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