Standard Precautions should ALWAYS be used when working with a patient, when some sort of contact with the patient is being done. If examination and skin-to-skin contact happens you should always wear gloves at the minimum.
Micro-organisms can only be seen with the help of a microscope. Therefore they can not be seen by the naked human eye.
If he does it in moderation
I'm sure the answer you are looking for is specific to your class, but I would say that the nurse should provide something like, "The tumor is most likely benign, but until we test further, we can't know if it's malignancy."
Melanocytes and keratinocytes work together in protecting the skin from UV damage when keratinocytes D. accumulate the melanin granules on their superficial portion, forming a UV-blocking pigment layer
