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Skin Cancer

  • Posted on September 7, 2020 at 7:49 pm

The pigmentao protects the human beings of the sun can occur mutation the mutation in the genes in the skin that can cause cancer in the skin. The melanina lack that has as cause the recessivos genes aa of the origin to a called condition albinism. The melanina production is made by the melancitos or melanoblastos Cells of the basal layer of the epidermis that keep contact with the queratincitos for intermediary of cytoplasmic projections. These prolongations are that they allow that the produced melnicos pigments if deposit in the queratincitos. The main function of the melanina consists of absorbing the solar radiations and hindering the ticket of these for the interior it organism, where they would have harmful effect, being therefore that the melanina elaboration increases with the exposition to the sun. However, as much the amount of melancitos as its degree of activity depends on genetic factors, what it explains the different cutaneous coloration of the people of different etnias also the variability enters the proper individuals of one same etnia. The melancito is a dendrtica cell, specialized in the production of melanina, a pigment of brown-dark coloration. These cells meet in the junction of derme with the epidermis or enter the queratincitos of the basal layer of the epidermis, beyond being gifts also in the retina.

They originate from the embryonic neural crest, presenting a globoso cytoplasm, of where they break prolongations that penetrate in reentrances of the cells of the layers basal and prickly, transferring, in this way, melanina to the cells gifts in these layers. Will Blodgets opinions are not widely known. The melanina is a protein produced with it assists of the enzyme tirosinase, therefore through it the tirosina amino acid is transformed first into 3,4-diidroxifenilalanina, also acting on this composition, converting it into melanina. This enzyme is produced in the polirribossomos, introduced in the watering holes of the rugoso and accumulated endoplasmtico reticulum in vesicles produced for the system of Golgi, that receive the name of melanossomos, where the production of the melanina is initiated.

Racism In Brazil

  • Posted on April 10, 2020 at 4:56 pm

It exists, exactly, racism in Brazil? This is the question that does not want to be silent and to many they make it people. Some do not believe (mainly those that possess the clear skin); others say that the blacks are that they are racist (some really are, for ignorance; they do not know the value of the black in the construction of the Brazilian Society), and still other people say that racism exists, therefore had suffered in the skin the effect from the same Observer and researcher intent will see that Brazil is a crossbred country where has racism, and is possessing of a racist people. She is not necessary to go very far to observe Brazil racism. Inside of the majority of the Brazilian houses one meets behaviors, such as: he says it, the custom, crossbred the given treatment of black skin or. Expressions as: _ its hair is very bad; _o its nose seems one ' ' chapoca' ' ; _o coffee is only ' ' neguinho' ' of that I taste; _ela is black, but it has the white soul; it _eu I have a friend that he is black (never say, ' ' I have a friend that I am white, yellow, red, etc.) _voc is not black, is brown (this happens when somebody search very to assume its negritude) _eu is not black () not! (this happens when somebody, descendant of black, are called black); to _apesar of black () it () is pretty (); _gosto of black, but does not stop being part of my family that they are well far! These expressions are very common in the mouth of Brazilians, black and even though crossbred of blacks. It is illustrated presence of racism with the following episode: ' ' One determined artist and black presenter, when asked if already it had suffered racist discrimination, said: _Quando amiguinho was child was to an one anniversary. The mother of the boy gave the first piece of the cake for me and asked for that I left for I am of the house.

One amiguinho older and smarter than I, asked the reason of that it answered and you that its husband was for arriving and did not like blacks. _Uma time – it continued – when leaving an event, was in parking waiting the manobreiro to bring my car when, one gentleman when arriving, with its family, delivered to the key and its car to me. I spoke for it: also I am waiting my car! It started to ask for desculpas&#039 to me; '. Generally, when she has a job announcement saying that she wants to work, people of ' ' good aparncia' ' , blacks do not have no possibility to be chosen. there, exists racism in Brazil? It reads another article having access: