A pigment called melanin protects the ___layers of skin from sun rays. A.underB.belowC.underlyingD.underneath 答案 C近义辨析。此题需辨清词性;本题空白处应填形容词,而选项;A.under作介词或副词;B.below作介词或副词;C underlying在下面的,下层的,为形容词;D.underneath作介词或副词;因此只有C正确...
melanin (redirected frommelanotic pigment) Thesaurus Medical Encyclopedia mel·a·nin (mĕl′ə-nĭn) n. Any of a group of naturally occurring dark pigments, especially the pigment found in skin, hair, fur, and feathers. American Heritage® Dictionary of the English Language, Fifth Edition...
Adler, A. 1942 Melanin pigment in the brain of the gorilla . J. Comp. Neur. , 76 501 – 507 .ADLER, A. (1942): Melanin pigment in the brain of the gorilla, Journal of Comparative Neurology 76, 501-507—: Melanin pigment in the brain of the gorilla. J. comp. Neurol. 76 , ...
2.a coloring matter or substance. 3.any of various biological substances, as chlorophyll and melanin, that produce color in the tissues of organisms. v.t. 4.to color; add pigment to. v.i. 5.to acquire color. [1350–1400; Middle English < Latinpigmentumpaint =pig-(s. ofpingeretopaint...
1) due to the deposition of melanin pigment, a genetic condition called "Fibromelanosis"19. It is supposed to have aphrodisiac and medicinal properties and is used in the treatment of many human diseases20,21. Consequently, it holds a special place in the livelihood of the tribal populations...
Aryl hydrocarbon receptor is critical for homeostasis of invariant γδ T cells in the murine epidermis. J. Immunol. 187, 3104–3110 (2011). CAS PubMed Google Scholar Luecke, S. et al. The aryl hydrocarbon receptor (AHR), a novel regulator of human melanogenesis. Pigment Cell Melanoma ...
The endothelium is a monolayer of cells on the posterior corneal surface that transports water from the stroma into the anterior chamber. This movement of water counters a natural tendency for the stroma to swell and is necessary to maintain a transparent cornea. Embryologic studies, in particular...
It remains a dermatologist-favorite due to its proven efficacy and safety. Key Ingredients of the Kligman Formula Hydroquinone: A powerful skin-lightening agent (4-8%) that reduces melanin production by inhibiting tyrosinase, an enzyme involved in pigmentation. Retinoids: Vitamin A derivatives (such...
Pigmentation is caused by the distribution of melanin, a black or brown pigment molecule, under your skin. This pigment exists to protect your skin cells from the sun, and everybody has it. But normally, we don’t notice a nice, even distribution of melanin. We just like how it looks—...
Together, they form the so-called epidermal melanin unit. The melanin produced and stored inside the melanocyte in the melanosomal compartment is transported via dendrites to the overlaying keratinocytes. The melanin pigment is a polymer produced inside the melanosomes and synthesised from the amino ...