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ADA NBDHE Dental Hygienist

Category - Scientific Basis for Dental Hygiene Practice

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Where do chemical mediators originate?

Plasma
Cytokines
Cells
Plasma cells

Explanation

Answer: D - Chemical mediators originate in plasma and cells. Plasma-derived mediators such as complement proteins and kinin are in precursor form and must be activated. Cell-derived mediators such as histamine, prostaglandins, and cytokines come from mast cells, platelets, neutrophils, and monocytes.

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