L.V. Sokolova - Ph.D. (Biol.), Professor, Chair of the Physiology and Morphology, Institute, Natural Science and Technologies, Northern (Arctic) Federal University named after M.V. Lomonosov (Archangelsk). E-mail: sluida@yandex.ru M.V. Roeva - Post-graduate Student, Institute of Medical and Biological Research, Northern (Arctic) Federal University named after M.V. Lomonosov (Archangelsk). E-mail:maryann19@yandex.ru