What are the progressive symptoms of radiation poisoning?

Speculate why. Also speculate on why radiation exposure is used as a therapy to treat some cancers.?

• X-rays emitted from some radioisotopes damage DNA, especially is cells undergoing DNA replication. Humans exposed to high levels of X-rays face radiation poisoning. Hair loss and damaged gut lining are early symptoms.

• Answer:

  Because X rays can cause damage to the DNA which the body is unable to repair, which results in APOPTOSIS, ie, programmed cell death. Since, the cancer cell DNA is more unstable, it is more likely to get damaged than that of a normal cell. The symptoms u've mentioned r may be because of generalized increase in generation of free readicals, which can travel to all parts in the body through the bood. Hope this helps. Bye. TC.