Introduction: If you missed the microscope lab we did in class, you will need to make it up by using a "virtual microscope" which can be accessed on the internet. In class, we obtained cheek cells by scraping the inside of the mouth with a toothpick and then rubbing the toothpick on a drop of water with blue stain. The blue helps you see the cells which are normally a clear color. The virtual lab begins at the step where you place the slide on the microscope page.
Print this page or write answers on notebook paper.
Access the Virtual Microscope at
Click on the link that says "the virtual scope"
1. Familiarize yourself with the microscope, run the tutorial and examine the parts you will be working with.
2. View the slide labeled cheek smear. Sketch the image at Scanning, Low and High Power. LABEL on high power the CELL MEMBRANE, CYTOPLASM, and NUCLEUS.
|Scanning (4)||Low (10)||High (40)|
3. Go to google and type "cheek cells" into the search box. Click on "images" to see all the images google has found on the web showing cheek cells (there should be hundreds).
What do all of these images have in common?
How do the cells vary from one picture to the next (how are they different)?
4. Why are the google images of cells different colors? What is the natural color of a cheek cell?
5. Use the internet or your textbook to define or describe each of the following terms that relate to the cell.
6. Keeping in mind that the mouth is the first site of chemical digestion in a human.Your saliva starts the process of breaking down the food you eat.Keeping this in mind, what organelle do you think would be the most numerous inside the cells of your mouth? (Hint: what organelle is responsible for breaking things down and digesting?)