Melanin

Melanin Melanin has played a significant role in human evolution. In this paper I will discuss the importance of melanin in its role in the human biological system and how it relates to the natural selection of suitable human life according to geography and environment. Human pigmentation is influenced by hemoglobins within blood vessels in the skin, carotene and melanins. Melanin, the basis of pigmentation, can be found in the forms of eumelanin and phaeomelanin. Eumelanin is the brown-black

Two times of melanin are produced within the body, one is called eumelanin and it is responsible for the golden brown color we normally associate with tanning. Another pigment is called pheomelanin and it produces a red color. Redheads and blondes produce more pheomelanin and less eumelanin, which is why they don't tan as well. Sunlight and ultraviolet rays affect the pituitary gland, a gland at the base of the brain that secretes hormones, which then produces melanocyte-stimulating hormone. This

Melanin is a pigment that determines the colour of the skin, eyes and hair, playing a role in camouflage, heat regulation and cosmetic variation. It also plays a critical role in photoprotection due to its ability to absorb harmful ultraviolet radiation (UVR). As the skin is the largest organ of the body, it is constantly influenced by external and internal factors thus, melanin is an important defence system that protects the skin against harmful factors (Costin & Hearing, 2007). The process by

the disease. The child therefore inherits one defective gene responsible for making melanin from each parents. Because the task of making melanin is complex, there are many different types of albinism, involving a number of different genes.A defect in one of several genes that produce or distribute melanin causes albinism. The defect may result in the absence of melanin production, or a reduced amount of melanin production. The defective gene passes down from both parents to the child and causes

Melanin is a dark compound that is called a photoprotective pigment. The major role of melanin pigment in the skin is to absorb the ultraviolet (UV) light that comes from the sun so that the skin is not damaged. Sun exposure normally produces a tan, which is an increase in melanin pigment in the skin. Many people with albinism do not have melanin pigment in their skin and do not tan with exposure to the sun. As a result,

What Is Melanotan 2? Melanotan 2 is a substance that helps stimulate melanin production. Melanin is a dark brown or black pigment that is naturally found in the skin. It is naturally produced when the skin is exposed to the sun. The skin produces extra melanin in order to protect the skin from further sun damage. How Does Melanotan 2 Work? Melanon 2 stimulates melanin production after the skin is exposed to minimal sunlight. It is ideal for people who have fair skin because it allows them to tan

presence of melanin in the iris of the eye. There are two forms of melanin, eumelanin which produces a blackish brown pigment, and pheomelanin which is responsible for the production of reddish yellow colored pigment. The quantity, and the ratio of these two pigments as they are present in the melanocytes found in the anterior border layer of the iris are responsible for the variation of color in the iris. Though all irises have approximately the same number of melanocytes, the amount of melanin found

it be height or your voice. But, what causes your skin to change as well? All the pigment in skin comes for melanin, which is produced by melanocytes. There are two kinds of pigment changes are called hyperpigmentation and hypopigmentation. Caused by genetics, ultraviolet rays, sunlight, and other natural of unnatural body functions. Hyperpigmentation is the increased production of melanin in the skin, and it usually causes unusual darkening. According to progressivehealth.com, it can be caused by

recessive inheritance of derangement of melanin biosynthesis. There are 4 varieties of oculocutaneous albinism including type I, type II, type III, type IV. Second type of oculocutaneous occurs in the presence of mutations in the OCA2 gene as known as BOCA, Pink-eyed dilution protein homolog, P gene. OCA2 encodes P protein that takes the role of the passage of tyrosine which is the precursor of melanin, whereat we can reach the fact that OCA2 involves melanin synthesis process, therefore flaws in

Most people have the same amount of melanocytes present in the skin. Melanocytes are located in the stratum basale, and are specialized cells that produce melanin. However, the differences present in skin tones across the human race is due to how much melanin the body’s melanocytes produce. Melanin is the body’s natural sunscreen and protects us from the sun’s powerful and potentially harmful UV rays. While UV rays can cause skin cancer, in appropriate amounts it helps the body produce Vitamin D