Radiosensitivity — NDEB AFK MCQ
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Correct answer: C — Lymphocyte
Lymphocytes are the most radiosensitive cells in the human body. They undergo apoptosis at very low radiation doses (0.25-0.5 Gy). This forms the basis for the law of Bergonié and Tribondeau — cells that are most radiosensitive are those that are undifferentiated, have high mitotic activity, and have a long mitotic future. Mature nerve cells and muscle cells are among the most radioresistant cells.
Reference: White & Pharoah – Oral Radiology: Principles and Interpretation, 8th ed., 2019