Melanin

sun. This is because freckles are basically clumps of melanocytes, and the sun's ultraviolet rays cause melanocytes to create more melanin, making the freckles darker. Now, many people with red hair also have freckles, which is partially because both red hair and freckles come from the same gene. As mentioned in previous paragraphs, pheomelanin is the kind of melanin that is responsible for giving hair and skin a red color.…

products after we get a tanning to be safe and keep your tan look without sun burning. Tan or self-tan. People have 6 degrees of skin colors (FDA classification). It starts from very fair skin to black skin according to melanin type. Fair skin needs high sun protection, because its melanin type can’t…

outermost layer of the skin, and is made up of the stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, and stratum basale. It is mainly comprised of the protein keratin, squamous epithelial cells and melanin. The epidermis acts as a waterproof barrier and the melanin absorbs ultra violet light to prevent burns, inflammation, and swelling of the skin. Dermis is the lower layer of the skin that contains collagen, nerve fibers, lymph vessels, and blood vessels that provides…

Tyrosinase is an enzyme that produces melanin from the amino acid tyrosine. Three different reactions were catalyzed by Tyrosinase; for the first reaction tyrosine is oxidized into DOPA by tyrosinase. Second, tyrosinase oxidizes DOPA to DOPAaquinone and the third reaction tyrosinase oxidizes DOPAquinone to DOPAchrome. The importance and meaning of the oxidation reactions is that DOPAchrome takes the position of a catalyst by DOPAchrome reacting to form melanin and the need catalyst is not…

I found that having freckles could bring the possibilities of having skin cancer. Based on a video interview made to Dr. Jablonski—an American anthropologist and palaeobiologist, she said that “freckles are like cancer factories because feel melanin is producing negative chemicals”(“Freckles: Evolutionary Advantage or 'Cancer Factories"). Eventually, making people fearful of getting “the MC1R gene that somehow can play a role in the cancer initiation or growth” (Healy). In other words, when…

External Attributions can be used to explain the blue-eyed children’s behaviour during the melanin exercise. According to Plotnik and Kouyoumdjian (2014), ‘External Attributions’ are “explanations of behavior based on the external circumstances or situations.” (P.585) In the case of the blue-eyed girl, her problem with multiplication tables was caused by a situation: the melanin experiment. The melanin experiment and the brown-eyed children’s behavior towards the blue-eyed children would have…

of what I classify as race. Race is not homo sapiens vs other but genetic diversity and groupings within the human race. Genetics affects race in several different factors. The amount of melanin causes a person to look black or white, “Melanin is a complex polymer derived from the amino acid tyrosine. Melanin is responsible for determining skin and hair color and is present in the skin to varying degrees; depending on how much a population has been exposed to the sun historically.” (Mandal)…

blotches on the body. This disease doesn’t just occur on the skins surfaces, but it can appear on the scalp causing spots of white blotches being seen in hair. Vitiligo occurs when there is damage to the melanocytes, which are cells that produce melanin. Melanin is the pigment…

The stages of human development can be culturally defined in addition to biologically defined. The biological stages describe when things grown in develop in a human throughout their life span. These stages are for the most part clear and stay pretty true to the ages in when things happen. However in different cultures, they will care for their children in different ways. In different cultures, they experience different upbringings; doing certain things differently because of the way their…

insulin receptor( insR.) The signals from these neurons are integrated in PVN and LHA to produce orexigenic or anorexigenic signals through the production of CRH (corticotropin-releasing hormone), TRH (thyrotropin-releasing hormone), ORX (orexin), MCH (melanin-concentrating hormone) etc. Figure adopted from Schellekens et al., (2012).303…