Monday, February 27, 2012

Cells in the News!

New Methods Could Speed Up Repair Of Injured Nerves

- John Hamilton, NPR

Nerves, of course, are cells which transmit information in our brain and between the brain and the rest of the body. Many scientists used to believe that nerve cells almost never repaired themselves. Some researchers are finding that there may be ways to help nerve cells regenerate to repair nerve injuries.

Story from National Public Radio

Study Suggests Way To Create New Eggs In Women

Scientists are finding that there may be ways to help women's ovaries to produce new eggs after their normal egg supply runs out. This may help women - especially women over 40 - to have children who might not have been able to otherwise. 

Thursday, February 9, 2012

Identifying Microorganisms

Use the following websites to help you identify as many of the organisms you can see in our pond water sample as possible. Draw detailed diagrams of the organisms you see and draw a comparison diagram from one of the websites.

You MUST try to identify the organisms you see in your water sample by using the images and descriptions you find on the websites. Take a look at several of the websites before you decide which one you want to use first.

Pond Water Critters ID page

Pond Life ID kit

Virtual Pond Dip

AAAS Pond Water A Closer Look

Pond 2 – Life in a drop of Pond Water

Once you think you've identified a microorganism you may search for other images or videos of it online to confirm your identification.

For example: 

Also try to identify any organelles you can in the microorganisms you observe. You may see nuclei or flagella or other organelles.
Flash Animation of Cells to DNA – Compares Eukaryotic cells to bacteria and zooms from chromosomes to chromatin to dna.

Cell Size and Scale - interactive