How does our body respond differently the second time a pathogen hits then the first time the same pathogen hits

Approximately what percentage of americans are affected by schizophrenia

What can evoke feelings of terror and panic

Melanocytes and keratinocytes work together in protecting the skin from uv damage when keratinocytes a. provide the melanocyte with a protective shield against abrasion b. maintain the appropriate temperature so the product of the melanocyte will not denature c. maintain the appropriate ph in order for the melanocyte to synthesize melanin granules d. accumulate the melanin granules on their superficial portion, forming a uv-blocking pigment layer