WHAT ARE STEM CELLS?
Stem cells are the master cells" of the human body that have the potential to develop into almost any type of cell.
They can be obtained in laboratories, and, in theory, can morph into nerve tissue blood, heart muscle and even brain cells. Researchers demonstrated for example that bone marrow cells can become liver cells.
Cells can be implanted into our bodies to repair the demage caused by illnesses like heart diseases, Parkinson's and Alzheimer's diseases, and many others.
In the future, stem cells are going to grow into complete organs like the kidneys, the liver, etc.
WHERE DO THEY COME FROM?
True stem cells come from human embryos, but they can also be found in adult tissue.
THE ETHICAL ISSUE
The problem begins when the scientists remove the cells from the embryos. When they do that, they destroy the embryo.
Pro-Life groups argue that this is immoral because when an embryo is destroyed a life is destroyed.
Scientists and researchers, however, emphasize the importance of the stem cell research. They say it is going to help millions of people.
1) Answer these questions in Portuguese. Find the answer in the text.
a) A que área de conhecimento está relacionado o texto?
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b) Qual é o assunto geral do texto?
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c) Que outro nome o autor usa para STEM CELLS?
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d) Qual é o argumento dos grupos a favor da vida diante da retirada de células de embriões?
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2) Escreva (T) para Verdadeiro-True, e (F) para Falso-False:
( ) Stem cells aren't able to transform.
( ) Stem cells are found in the human body.
( ) In the future stem cells can help cure many diseases.
( ) Unfertilized eggs can produce embryos.
( ) Nobody questions the use of embryo cells to produce stem cells.
Postagens
8 de fevereiro de 2012 às 20:35
1a-Esta relacionado a biologia
2b-Células-tronco
3c-Células mestra
estuda células
(v) As células-tronco não são capazes de transformar.
(v) As células estaminais são encontradas no corpo humano.
(v) Nas células-tronco no futuro podem ajudar a curar muitas doenças.
(f) Os ovos não fertilizados podem produzir embriões.
(f) Ninguém questiona a utilização de células de embriões para produzir células estaminais.