Marilyn Macrochenia conducted an experiment in which determined that the peculiarities of the nervous system are related to the type, which includes hair and skin of the person. The intensity of pigmentation of hair, skin, iris is responsible development of melanocytes. What it more, the higher pain threshold.
The researchers also observed that the effect of painkillers is much faster ends at the fair-haired or light-brown man than the dark-skinned brunette.
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