Break down tissues, inhibit cellular functions, and ___ may happen if blood pH was to become too acidic.

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?

Cardiovascular efficiency, muscular strength and endurance, flexibility, and body composition are all related factors.

Claustrophobia is an example of a(n)