When a person floating in swimming pool, they experience an upthrust. what causes this effect?

Which best describes a consequence of steroid abuse

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?

Health terminologyan incision of the thyroid gland is called: