Library lesson

THis morning you will be either finishing off posters or finding and interpreting S.E.M. images to meet the criteria for P4.  Use these sites to start with - http://www.sciencephoto.com/ , http://www.anatomybox.com/tag/sem/ or try searching with google images.  Remember, you need to describe images of tissues and cells, NOT whole organisms like ants.

You can work in a word document, but make sure you explain what each image is in your own words - without using copy and paste.  We'll have a lesson on the microscopes next week, so make sure that you have as much of the other criteria done by today as possible.

These are rod and cone cells from the retina in the eye - they receive light and send nerve impulses to the brain allowing us to see.

                                                

I.T. lesson

Today we will be looking at some more infromation on cells and microscopy.  This will help to prepare you for the assignment that we'll start working on next lesson (this friday).  Answer the following questions in your books, using the links below to help you.

1. Give an example of a prokaryotic and one eukaryotic cell.  Outline two differences between them.
2. Explain why mitochondria and chloroplasts have their own DNA.
3. Briefly explain why erythrocytes (red blood cells) have NO nucleus (relate structure to function).
4. Describe the contributions that Scanning and Transmission electron microscopes (SEM and TEM) have made to Science.
5. Click on the link about Plant and Animal cells, and use the animation to describe the structure and function of the golgi complex, cell membrane and mictotubules.  Draw simples diagrams of their appearance.

PDF with some useful information about prokaryoticc/eukaryotic cells - http://www.biologymad.com/resources/AS%20Cells.pdf
Origins of chloroplasts and mitochondria - http://www.biology.iupui.edu/biocourses/N100/2k2endosymb.html
Red blood cells - http://library.thinkquest.org/25896/sub_blood/rbc.htm
Microscopes - http://invsee.asu.edu/srinivas/sizescalemod/microscopy.htm
Plant/Animal cells - http://www.cellsalive.com/cells/cell_model.htm

Try this once you're finished - http://www.nobelprize.org/educational/medicine/2001/cellcycle.html or http://www.sheppardsoftware.com/health/anatomy/cell/index.htm