Is/are used by the the body to synthesize vitamin d, maintain the proper malfunctioning of nerve cells, keep skin soft and supple, and transport fat to cells

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?

There are two main levels of responsibility related to fitness and fire apparatus operations and preventing injuries and line of duty deaths. the first level involves personal responsibility. the second level involves

Explain the purpose and function of the icd-10-pcs coding system, include reasons for the transition from icd-9 vol. 3.