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Stem Cells


             cells that will eventually become the placental tissues and the fetal tissues respectively. Once a .
             cell begins to differentiate, however, its totipotonic status is lost and the cells are now referred to .
             as pluripotent. Pluripotency refers to a cell that differentiates into most tissues and is itself .
             partially differentiated. Several stem cell types exist in the body that have the purpose of .
             proliferating and differentiating in order to replace or replenish very specific tissues. This .
             furthers type of stem cell is called multipetent. Multipotent stem cells exist in both adults and .
             children and represent some of the best-understood cellular systems. One example of this type of .
             system are blood stem cells found in the bone marrow. One of these cells has the ability to .
             divide into any of the various blood cell types found in the circulation. New scientific studies are .
             finding such stem cells throughout the body including the discovery of neural stem cells of rats.
             The study and discovery of these cells are dependent upon an ex vivo expansion and in vitro .
             culture of the cell population. This entails the removal and/or retrieval of the stem cells from the .
             source or host followed by in vitro culture using artificial conditions and growth nutrients. .
             Advances in technology and understanding of cellular signaling has enabled scientists to discern .
             the exact signals and conditions necessary to differentiate these stem cells into specific tissues in .
             vitro. Most of this headway has been performed on pluripotent and multipotent cell systems. .
             Some in vitro studies have been conducted based on in vitro results and information. Recent .
             evidence from a study involving murine neutral stem cells has suggested that multipotent cells .
             may have the ability to de-differentiate and re-differentiate themselves as different tissues. The .
             study was able to demonstrate that transgenic re-integrated neural cells transferred to bone .


Essays Related to Stem Cells

1. Stem cells

Stem Cells: Are They More Than Just Cells? Should stem cells be considered as a life? ... Stem cells are considered the building blocks of biology. ... The different types of stem cells are embryonic stem (ES), embryonic germ (EG), fetal stem cells, and adult stem cells. ... Stem cells also come from vitro fertilization, which happens in a petri dish, to create embryos from which stem cells are extracted. ...

  • Word Count: 1225
  • Approx Pages: 5
  • Has Bibliography
  • Grade Level: High School

2. Stem Cells

Thirty years ago they discovered the stem cell. Now, scientists are researching human stem cells. ... Stem cell research has become a very controversial issue today. ... But because of the controversies around stem cells, some people want stem cell research stopped. ... There have been many publicized events on stem cell research. ...

  • Word Count: 772
  • Approx Pages: 3
  • Grade Level: High School

3. stem cell

Many urged President Bush to agree with former President Clinton's policy on stem cell research and that was; that the Congressional ban on funding embryo research would not be broken if the support was provided for only stem cell research and not for human cloning and no embryos would be destroyed to acquire these stem cells. ... Arlen Specter, R-Pa wants funding of stem cell research without any limitations. ... Arlen is the most critical of President Bush's policy on stem cell research funding. ... Thompson argues that he did not believe that any of the stem cells were conta...

  • Word Count: 2542
  • Approx Pages: 10
  • Grade Level: Undergraduate

4. Stem cells

Stem Cells 1. ... Adult and cord blood stem cells can be donated. If embryonic stem cells are done through donation, then I condone them for research only. ... Stem cells are important for living organisms for many reasons. ... Unlike muscle cells, blood cells, or nerve cells " which do not normally replicate themselves " stem cells may replicate many times. ...

  • Word Count: 764
  • Approx Pages: 3
  • Grade Level: High School

5. Stem Cell Research

Stem cell research has become an issue of much debate. ... The basic ethical issue raised is related to where we obtain the stem cells. ... Stem cells can also be obtained from an adult's blood or bone marrow, but these stem cells are not as versatile and can grow only into a few select tissues, as opposed to embryonic stem cells that can grow into almost any tissue (Stem Cells: Corporate Profile). ... However, there are two conditions for my support of stem cell research. ... He announced on August 10, 2001 that some federal funding for stem cell research would be provided for ste...

  • Word Count: 812
  • Approx Pages: 3
  • Has Bibliography

6. Stem Cell Research Persuasive

Stem cell research is a controversial issue in America. Stem cells are a primitive cell that can multiply and conform to be any cells. Unfortunately, the best source for stem cells is human fetal tissues. To extract the stem cells, you will in turn, kill the embryo. ... Both of these are options for obtaining stem cells. ...

  • Word Count: 439
  • Approx Pages: 2
  • Grade Level: High School

7. The Purpose of Stem Cell Research

Some of the stem cells sources are adult stem cells, cord blood stem cells, embryonic stem cells, freckles that yield stem cells, and stem cells from extracted teeth. Adult stem cells, also called somatic stem cells, possess the same basic characteristics of all stem cells[Mur14]. ... The reason why we have adult stem cell in our body is to repair and maintain specific tissues adjacent to the adult stem cell. ... Embryonic stem cells are derived from embryos. As with all stem cells, embryonic stem cells are unspecialized cells that have the ability just like the adult stem cells[Mur14]. ...

  • Word Count: 826
  • Approx Pages: 3
  • Has Bibliography
  • Grade Level: High School

8. Stem Cells

Stem Cell Research, it's Past and Current Policy Stem cells are the latest controversial topic in the forefront biological research. ... Embryonic stem cells are unlike any other adult stem cells. ... Another type of stem cell that has properties similar to the embryonic stem cell is the embryonic germ cell, derived from the early stages of the developing fetus. ... This method collects embryonic stem cells. ... To create embryonic stem cells for research, a "stem cell line" must be created form the inner cell mass of a week-old embryo. ...

  • Word Count: 1512
  • Approx Pages: 6
  • Grade Level: Undergraduate

9. Adult Stem Cell Research

Recently, I have been researching the positives and negatives of adult stem cell research and embryonic stem cell research. Throughout my findings, I have discovered that I feel as if adult stem cell research is more beneficial for many people because adult stem cells offer a possibility of a renewable source of replacement tissues and cells, adult stem cells have the ability to differentiate in to other types of cells, and also adult stem cell research can further advance the possible cures and benefits that adult stem cells provide, that can further provide treatment for diseases, disabilit...

  • Word Count: 435
  • Approx Pages: 2
  • Grade Level: Undergraduate

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