During eccentric muscle contraction, the muscle _

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?

Many factors influence your mental and emotional health

Bulimia nervosa cannot be prevented, but it can be treated if diagnosed early. true or false?