Explain why radon stands out as important source of exposure to naturally occurring ionizing radiation.
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Summarize the factors, related to both exposure and hazard, that combine to make naturally occurring radon a concern as a risk factor for lung cancer in uranium miners (or in the general population in some geologic regions).
2- Explain naturally-occuring human chimerism how could it occur, and why in important for the general public to be aware of its possibility.
During the past several decades there has been an alarming increase in the incidence of skin cancers, including malignant melanoma, that has been attributed to increased sun exposure.
1. Explain the possible mechanism whereby ultraviolet radiation promotes the development of malignant skin lesions. 2. Cite two important clinical signs that aid in distinguishing a dysplastic nevus from a malignant melanoma