Site control zones at a hazardous materials incident are established primarily

Site control zones are established to prevent people from entering contaminated or hazardous areas. For example, there are site control zones in Ebola tents. Assuming you are talking about something like a nuclear waste spill or such, they would be established to prevent people from getting radiation sickness or further destruction of cells.

60 minutes or more of a combinationof aerobic and muscle-strengtheningexercises physical activity recommendation.adults

Olfactory epithelium i believe