Where do antigens come from?

Increased use of cocaine can reduce the period of stimulation. true or false

Acoastal community is drafting a plan in case of a hurricane. which action is an appropriate element for an effective plan? 1.) creating a map of areas that are not affected by storm surge 2.) plotting the location of all fire hydrants along major travel routes 3.) relocating any individuals who might be affected by the disaster 4.) identifying multiple evacuation routes for each area of the community

Brian said that when you get your body broken such as a arm or leg. it means your bones break to pieces and must do surgery or get a cast to fix it.is it true or false?