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Here are some more information for Cell Culture:

Normal Cells vs. Tumor Cells

Tumor cells vary from normal cells in several basic ways. First, the division of normal cells is tightly regulated by special cell signals. With tumor cells, it's as if the signals are no longer produced or perhaps they are no longer received.

Research involving cells is often accomplished by removing the cells from an individual and growing them in a sterile dish with the nutrients required for their survival. Growing cells for research use is termed "cell culture". Just by watching normal cells in cell culture it is obvious that their division is regulated by something. Normal cells in culture grow until the bottom of their dish is carpeted with the cell. The layer is only 1 cell thick. Once this density is reached, they stop dividing because there is no more space. If one cell dies, an adjacent one will divide to fill in the space. Additionally, normal cells will divide a certain number of times after which time, the division process halts. There are a certain pre-determined number of generations that may be produced and then there is no more dividing. Eventually, the entire culture will die.

With tumor cells, it's a completely different story. Tumor cells will divide over and over, time after time; forever if supplied with nutrients. With enough time, tumor cells in culture will become a piled up mess. They lack order to their growth. It is as though tumor cells lose have lost the capacity to follow the rules and they divide (proliferate) out of control.

A second major difference between normal cells and tumor cells is that normal cells perform a special function or duty for the body. Healthy cells have specialized behaviors and serve a purpose. For example, lung cells have a specialized duty to perform while cells of cardiac tissue have a very different one. Normal cells taken from different tissues even have very different appearances. Tumor cells have a different appearance than normal cells taken from the tissue they are derived from. This is due to the fact that they have lost their specialized function.

Differentiation is the term given to describe the specialized function a given cell has. Differentiation and proliferation are closely tied together. In general, a cell that proliferates at a high rate loses some of its specialized function. The problem is, it really doesn't have time to perform a specific function since its too busy dividing. Cells that perform a highly specific function (i.e. differentiated) have a lower rate of proliferation. Researchers are studying the possibility of making tumor/cancer cells differentiated so they might lose their ability to proliferate continuously. In theory, this would cause the tumor to stop growing.

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I need ideas to include in my essay about cell phones and culture?

I need to write 6 pages. The essay has to be on technology and culture (I decided to do it on cell phones). What can I write about and how ca I break it up into soooo many pages? Any help is appreciated since its due in two days?

i will give you an intro paragraph.

CELL PHONES AND MODERN SOCIETY:

In today's day in age society is confinded to the modern technologies that have been presented to us. One of the objects that conform us in modern society is a cell phone. The cell phone has revolutionized the society as we know it. It not only allows us to communicate with each other easier it allows us to access the internet and thus is a branch way to many other technological advances.

Basically you can drag and drag that on forever you can possibly write a 20 page paper because you said that it is a branch way to other technologies so you can include all of them but dont get too carried away!

hope i helped and Good Luck=]

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RESEARCH TRIANGLE PARK, N.C., March 9 /PRNewswire/ -- Chimerix, Inc., a biotechnology company developing orally-available antiviral therapeutics, today announced the initiation of a multi-center Phase 2 clinical trial designed to evaluate CMX001 in stem cell transplant recipients who are seropositive for cytomegalovirus (CMV). CMX001 is a broad-spectrum antiviral agent with demonstrated activity ...

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