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Miss Baker's Biology Class Wiki
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9th Honors Biology
Science Online '09
Why is Stem Cell Research Important?
have the ability to develop into many different types of cells in the body during early life and growth. They serve as an internal repair system in most tissues. They divide and repair and replenish other cells. After a stem cell splits each cell can either remain a stem cell or become a different type of cell with a specialized function. It can be become a muscle cell, a red blood cell or a brain cell. Stem cells are different than other cells in your body. All stem cells have three properties. They can divide themselves or renew themselves for long periods. They are unspecialized. They can give rise to specialized cell types. Unlike other cells, they can replicate many times.
President Obama recently ended an eight-year-old ban on embryonic
stem cell research
. He signed an executive order which he said was, "an important step in advancing the cause of science in America." "We will vigorously support scientists who pursue this research,"
at a signing ceremony in the White House. "And we will aim for America to lead the world in the discoveries it one day may yield." Obama's ended former President George W. Bush's ban on federally funded embryonic stem-cell research to cell lines created before Aug. 9, 2001. Congress tried twice to reverse that ban, and his National Institutes of
Elias Zerhouni, urged an end to the restrictions
, but Bush vetoed the legislation both times.
Stem cells can be used for many different things. Recently a teen’s missing facial bones were grown back from
stem cells from fat
. This proves that stem cells can be used for the reconstruction of bones. A fourteen year old boy’s cheekbones were replaced using stem cells from his own body. Adult stem cells like the blood-forming stem cells in bone marrow (called HSCs) are the only type of stem cell used to treat diseases. Doctors have been using HSCs for bone marrow transplants for over 40 years. Advances in techniques of collecting, or "harvesting" HSCs have been made. HSCs are now used to reconstitute the immune system after leukemia, lymphoma, or various blood or autoimmune disorders have been treated with chemotherapy.
Recently scientists at the
Institute for Stem Cell Therapy and Exploration of Monogenic Diseases
human embryonic stem cells
made human embryotic stem cells into multilayered skin tissue and they group grafted the human stem cell from skin onto five mice. The foreign tissue grew for 12 weeks. it could at least be a safe temporary solution until skin tissue from a patient's body, aka
graft tissue, is ready.
What's the difference between adult stem cells and stem cells taken from an embryo?
Why is there controversy about stem cell research?
Could there be alternatives to studying embryonic stem cells?
Rohit Evaluation: Nice post. You have hyperlinked sources and two videos. I see a picture but cant tell if its a creative commons picture. But you should add questions. Also you might want to state why stem cells are important.
How Will I Meet This Expectation?
How Did I Meet This Expectation?
Demonstrate ability to evaluate sources of biology information on the internet
I will start by using the credible sources we were given in class.
I only used souces that were aproved such as The American Medical Association
I hyperlinked my sources
I added a credible source to the page
Demonstrate an ability to read and understand current biology news
I will re-read the articles
If I have any questions I will ask Ms. Baker
I only used articles written in the last six months
I put the articles into my own words
Demonstrate proper use of online resources
I will hyperlink my sources
I will use only sources in the credible sources
I will use multiple articles for my posts
I hyperlinked my sources
I embedded my sources into words in my post
I used muliple sources for my blog posts
I uploaded a creative commons photo of an embryonic stem cell
Publish work that is available for peer-review
I will make comments on others post to help improve there work
Rohit reviewed my post
I posted a credible source on the credible source page
I added three questions to my blog post
Discuss published work with a practicing biologist in that particular field
I will see primary sources written by biologists
I used sources written by experts in stem cells
I contacted the doctor who worked on the cheebones of a boy using stem cells
Provide constructive peer-review to classmates
I will review my classmates credible sources
I will review a classmates post
I approved Carl's credible source
I approved Alex's credible source
I reviewed Rohit's post
I helped some of my classmates understand the project
Discuss in-class assignments
I will apply what I learned in biology to my posts
Stem cells are in our textbook
Apply creativity to work
I will had pictures and videos to my posts
I uploaded videos on Stem Cell research
I uploaded a video of the Presidents speech
I added a graphic
I uploaded a photo of Stem Cells
I uploaded a photo of a skull having its cheek bones replaced using stem cells
My two favorite bands are
. My favorite movie is
The Dark Knight
. My favorite show is
. I have a tabby cat named Smudge.
help on how to format text
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