You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Epidermal Melanin unit is? and explain in detail?
Ans. d. 36 keratinocytes: 1 melanocyteThe ratio of Epidermal-Melanin unit is 36 keratinocytes: 1 melanocyte.Each epidermal melanocyte together with the epidermal cells that it serves, comprises an 'epidermal melanin unit', as first described by Fitzpatrick and Breathnach in 1963. Although the number of active epidermal melanin units varies considerably in the different regions of the body, the number of keratinocytes served by each melanocyte remains constant. It is estimated that a single melanocyte supplies melanosomes to a group of about 36 viable keratinocytes.