Examlex
A state senator's comments about the dangers of global warming are an example of what type of variable?
Helper T-Cells
A type of white blood cell that plays a critical role in the immune system by activating and directing other immune cells.
Antigens
Substances that provoke an immune response in the body, especially the production of antibodies.
Immune Cells
Cells within the body's immune system involved in defending the body against infectious disease and foreign invaders.
Trigger
An event, situation, or emotion that initiates or causes a specific reaction or response.
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