Knowledge and Understanding of Behavior - Essay Example

This article in part puts emphasis on the role that heredity or nature plays on the skin, which is the prevalent, independent endocrine organ in the body. This article by Fink, Matts and Samson suggests “skin appearance is determined primarily by its colouration and surface topography (166). The article discusses in depth about skin pigmentation that leads to colour differences amid different cultural groups, is a highly heritable characteristic. No doubt, there are six genes responsible for the expression of usual pigmentation.

The colouration of human is established by just four main pigments, including carotenoids, melanin, reduced haemoglobin and oxygenated haemoglobin. However, it is evident that women differ from men in two major components of skin colour. The skin of women is on the whole poorer in oxygenated haemoglobin and melanin than that of men. For example, East Asians, have a yellowish complexion because their skin has a greater amount of phaeomelanin to eumelanin. Conversely, the article looks in depth at the ageing process.

There are two types of ageing processes that have a discussion in the article, they include Intrinsic ageing and Extrinsic ageing. Intrinsic ageing processes are structural transformations that happen as natural results of ageing and are established genetically. When the article looks at the extrinsic ageing, it thereby emphasizes on the environment. For this case, extrinsic ageing is influenced by environmental aspects, including smoking, exposure to solar UV-radiation, ozone and dust, amid other factors.