INBDE (Integrated National Board Dental Examination) Practice Exam

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What does the paracortex of lymph nodes contain?

B cells
Plasma cells
Macrophages
T cells

The correct answer is: T cells

The paracortex of lymph nodes contains high concentrations of T cells, which are a type of white blood cell. B cells, plasma cells, and macrophages can also be found in the lymph nodes, but in lower concentrations. However, the paracortex is primarily associated with the activation and proliferation of T cells during an immune response. Therefore, while all of the options may be present in the lymph nodes, only T cells are specifically concentrated in the paracortex.