What is the function of melanin in the skin?
In its various forms, melanin fulfills a variety of biological functions, including skin and hair pigmentation and photoprotection of the skin and eye. Pigmentation of the skin results from the accumulation of melanin-containing melanosomes in the basal layer of the epidermis.
How does melanin protect the skin quizlet?
Melanin protects the dermis and epidermis from UV radiation. Overexposure to UV radiation can lead to DNA damage, causing mutations and development of cancer. … The arrangement of dermal papillae produce epidermal ridges, most prominent on hands and feet.
How much SPF does melanin have?
The efficacy of melanin as a sunscreen was assumed to be about 1.5-2.0 sun protective factors (SPF); possibly as high as 4 SFP, implying that melanin absorbs 50% to 75% of UVR. An SPF of 2 means the doubling of protection of the skin against sunburn.
Which one of the following is the function of melanin *?
Melanin is a pigment that gives the skin color. This melanin is produced by so called melanocytes in the skin. Melanin is the bodies own way to protect the skin against sunlight . The molecule effectively absorbs UV-light and neutralizes damaging molecules (radicals) created by exposure to sunlight.
What is the function of melanin in the skin quizlet?
What are the functions of melanin? Melanin provides skin color and protects against the damaging effects of ultraviolet radiation.
How does melanin protect the skin from the effects of ultraviolet light quizlet?
Melanin, in turn, helps prevent excessive skin damage by absorbing UV radiation before it reaches the deep layers of the epi- dermis and dermis. Within the epidermal cells, melanin concentrates around the nucleus, so it absorbs the UV light before it can damage nuclear DNA.
How does melanin protect these molecules from UV radiation damage?
How does melanin protect these molecules from UV damage? They form a shield that protects important molecules circulating in blood vessels in the dermis. … -Exposure to UVB radiation causes pyrimidine dimers to form.
What is melanin and what is its function quizlet?
melanin (definition) Brown pigment produced by melanocytes located in the hair, skin, and iris of the eye which protects you from ultraviolet light.