These hazards can cause biological damage to body tissues from overexposure.

These hazards can cause biological damage to body tissues from overexposure.

• A. Flammable
• B. Reactive
• C. Radioactive
• D. Toxic

Answer: (C)

Biological damage from overexposure is caused by ionizing radiation from radioactive sources. When radiation penetrates tissue, it ionizes molecules and creates free radicals that damage cells and DNA, leading to cell death and tissue injury. The extent of damage depends on the dose, how quickly it is received, the type of radiation, and how well shielding or distance is used to limit exposure. In safety practices, radioactive hazards are managed with time, distance, shielding, and monitoring to keep exposure low. Flammable hazards involve ignition and burns, reactive hazards concern dangerous chemical reactions, and toxic hazards involve chemical poisoning—these can harm the body too, but the overexposure described here most characteristically points to radiation.

Biological damage from overexposure is caused by ionizing radiation from radioactive sources. When radiation penetrates tissue, it ionizes molecules and creates free radicals that damage cells and DNA, leading to cell death and tissue injury. The extent of damage depends on the dose, how quickly it is received, the type of radiation, and how well shielding or distance is used to limit exposure. In safety practices, radioactive hazards are managed with time, distance, shielding, and monitoring to keep exposure low. Flammable hazards involve ignition and burns, reactive hazards concern dangerous chemical reactions, and toxic hazards involve chemical poisoning—these can harm the body too, but the overexposure described here most characteristically points to radiation.