Registered Sanitarian Practice Test

Alpha particles have little penetrating power, which makes them unable to pass through most materials, such as paper or skin. However, when inhaled or ingested, they can pose a significant health risk due to their high ionizing capability. Inside the body, alpha particles can cause damage to biological tissues and DNA, increasing the risk of cancer and other health issues.

In contrast, X-rays, beta particles, and gamma rays are more penetrating and can travel through various materials, which diminishes their risk when contained outside the body but makes them hazardous in different scenarios. Therefore, the unique properties of alpha particles make them particularly dangerous when they enter the body, highlighting the importance of controlling exposure to these types of particles in environments where inhalation or ingestion could occur.