Final answer:
High-level radiation exposure can cause immediate symptoms and even death. In the long term, it increases the risk of cancer and genetic defects. It is important to minimize unnecessary exposure to radiation.
Step-by-step explanation:
High-level radiation exposure can have a range of health effects. In the short term, exposure to a large amount of radiation can cause noticeable symptoms or illness, and in extreme cases, it can even lead to death. For example, a dose of about 500 rems has a 50% probability of causing death within 30 days. Long-term exposure to radiation can increase the risk of cancer and genetic defects. The risk of cancer is proportional to the dose of radiation, even at low levels. It is important to avoid unnecessary exposure to radiation to minimize these health risks.