Why are there cultural challenges related to communication

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?

Which stage of stress includes the “fight-or-flight” response? automatic exhaustion alarm resistance

Chris has a thrombotic disorder which class of medications would his doctor prescribe to inhibit the thrombosis