How many different forms of cancer have already been discovered? How does an action potential affect the eye? What are all the types of teeth in the human mouth? What gives the yellow color to urine in humans? Why does the lack of melanin produce a blue/bluish-colored iris? What forms ...
Dark spots form when melanosomes (tiny, melanin-containing capsules) accumulate in the skin, resulting in concentrated areas of pigmentation. Here are the three primary causes: Sun Exposure: Long-term UV exposure leads to sunspots, age spots, and lentigines. Hormonal Changes: Hormonal fluctuations...
34. Tief K, Hahne M, Schmidt A, Beermann F: Tyrosinase, the key enzyme in melanin synthesis, is expressed in murine brain. Eur J Biochem 1996, 241(1):12-16. 35. Tief K, Schmidt A, Aguzzi A, Beermann F: Tyrosinase is a new marker for cell populations in the mouse neural tube....
Our skin color is determined by a pigment called melanin, and while everyone has melanin (both fair and dark-skinned people), it comes in different forms and ratios. The two forms of melanin are calledeumelanin and pheomelanin. Eumelanin comes in primarily brown and black hues, while pheomela...
Briefly state why the leaves of plants have a green color. Explain the science behind why human eyes come in so many colors. What does the results from the absorption spectrum tell you about the specific pigments in the leaf? What technique was used to separate the leaf pigmen...
The linea nigra is theresult of fluctuating hormones during pregnancy. One theory is that the hormones cause your body to produce larger amount of melanin (a compound responsible for giving your skin pigment), and this extra pigmentation shows up as a dark pregnancy line on your stomach. ...
What is the best sunscreen to use and what should you look for in a good sunscreen? Follow the Coppertone sunscreen guide to find your new sunscreen today. Read more Does Sunscreen Expire? Ever wondered if your sunscreen has expired and if it’s still effective? Find out how long sunscreen...
Let's consider a simple example. If I spend some time out in the sunlight, I will develop a tan. That is essentially an epigenetic process, involving changes in gene expression that increase the production of melanin in my skin, resulting in darkening of the skin tone. Here, there is a...
June 2014: For the first time in the history of Catholicism, Pope Francis authorized“Islamic prayers and readings from the Quran”at the Vatican. In ancient times, this would have been considered blasphemy, but today nobody really even notices when something like this happens. ...
How do keratinocytes obtain melanin? What happens to the epidermis as the skin ages? Why do zooplankton have to stay in the sunlight zone? Why is sunlight important for the biosphere? How is sunlight a limiting factor in water ecosystems? How does sunlight, carbon dioxide, and water affect ...