okay I know my the top of my head hasnt been exposed to much sun so it will burn easily since I shaved it BUT isnt it good that it gets SOME exposure to sun so that it will build resistance to it?
The uv light damages cells in the skin, the layer of pigment in the dead cells in the upper layer of the epidermis blocks the uv light so that it will not reach the living cells beneath it.cronxeh said:And why would a dark skin be more 'resistant' to Sun again?
Short exposure of the skin to the sun is better, but will still damage some skin cells.hypatia said:Building up a "base" tan on your head will not prevent damage to your skin. My mother has skin cancer, and she tanned, as she thought wisely, a little at a time.
Getting off-topic, but photoreactivation is also a method used by some bacteria (or was it viruses?...aw, crud...gotta dust off my text books) for DNA repair.Reality_Patrol said:Has anyone heard of photoreactivation? It's the simple little trick plants use to protect themselves from getting "leaf cancer".
It's bacteria, viruse are too simple for that type of system. if I remember correctly, some repair mechanism were found using E. coli infected with phages.Phobos said:Getting off-topic, but photoreactivation is also a method used by some bacteria (or was it viruses?...aw, crud...gotta dust off my text books) for DNA repair.