Define transport meduim

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?

Describe the purpose and function of recording the start and stop time for anesthesia services.

Wheeled coach ambulance uses an interactive computer program to develop and document its products. what is it called?