Ignore the last question :>

How do the uv rays cause damage?   what exactly causes the skin to burn;   can you be more specific about this mechanism?   3. how do photosensitive medications increase a person's sensitivity to sunlight and therefore increase their risk of getting burned?     what kind of medications can increase photo-sensitivity, can you think of some examples?

All of the following are potential risks of leaving a small child unattended in a car, except: a. hypothermia b. carbon monoxide poisoning c. car theft with child inside d. lead poisoning

What does fi stand for in the fitt-vp principle of exercise prescription?