Which factor specifies the kind of cell that is exposed to radiation?

Which factor specifies the kind of cell that is exposed to radiation?

• A. Chronic exposure
• B. Type of cell exposed
• C. Dose rate
• D. Acute exposure

Answer: (B)

The kind of cell exposed is what determines which cells actually receive the radiation and how they respond. Different cell types have different sensitivities to radiation—rapidly dividing, undifferentiated cells are typically more radiosensitive, while mature, slowly dividing cells are more resistant. This means the same radiation exposure can cause different tissue effects depending on which cell populations are hit. Dose rate and exposure pattern (acute vs chronic) influence how much energy is delivered and how much time cells have to repair, but they don’t specify which cells are exposed, making the cell type the primary factor in identifying the exposed cells.

The kind of cell exposed is what determines which cells actually receive the radiation and how they respond. Different cell types have different sensitivities to radiation—rapidly dividing, undifferentiated cells are typically more radiosensitive, while mature, slowly dividing cells are more resistant. This means the same radiation exposure can cause different tissue effects depending on which cell populations are hit. Dose rate and exposure pattern (acute vs chronic) influence how much energy is delivered and how much time cells have to repair, but they don’t specify which cells are exposed, making the cell type the primary factor in identifying the exposed cells.