What radiation dose can lead to temporary sterilization of the testicles?

The correct dose that can lead to temporary sterilization of the testicles is approximately 200 rad. This level of radiation exposure can cause damage to the seminiferous tubules in the testes, which are responsible for sperm production. This damage may result in a temporary cessation of spermatogenesis, leading to a condition known as temporary infertility or sterilization.

Exposure to doses lower than 200 rad, such as 30 rad or 10 rad, typically does not cause noticeable effects on fertility or lead to temporary sterilization. While very high doses, such as 300 rad, can indeed result in more severe and potentially permanent damage, the threshold for temporary effects is around 200 rad.

Understanding the biological effects of radiation on human tissues, particularly reproductive organs, is crucial in radiological safety and health physics. This knowledge helps inform safety standards and exposure limits in various settings, particularly those involving radiation work.