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Which statement is correct?
Epinephrine Levels
The concentration of epinephrine, a hormone and neurotransmitter also known as adrenaline, significant for the body's fight-or-flight response.
NK Cell Count
The quantity of natural killer cells, a type of white blood cell that plays a crucial role in the body’s immune response by attacking virus-infected cells and tumors.
Cortisol Levels
The concentration of cortisol, a stress hormone produced by the adrenal glands, which can indicate an individual's response to stress.
Lymphocytes
A type of white blood cell that plays a significant role in the body's immune system, fighting infections and diseases.
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