HUMAN CHEEK CELL
1.Put a drop of methylene blue on a slide.Caution: methylene blue will stain clothes and skin.
2. Gently scrape the inside of your cheek with the flat side of a toothpick.Scrape lightly.
3. Stir the end of the toothpick into the stain and throw the toothpick away.
4. Place a coverslip onto the slide
5. Use the SCANNING objective to focus.You probably will not see the cells at this power.
6. Switch to low power. Cells should be visible, but they will be small and look like nearly clear purplish blobs.If you are looking at something dark dark purple, it is probably not a cell
7. Once you think you have located a cell, switch to high power and refocus.(Remember, do NOT use the coarse adjustment knob at this point)
---Sketch the cell at low and high power.Label the nucleus, cytoplasm, and cell membrane. Draw your cells to scale.
1. Why is methylene blue necessary?
2.The light microscope used in the lab is not powerful enough to view other organelles in the cheek cell. What parts of the cell were visible.
3. List 2 organelles that were NOT visible but should have been in the cheek cell.
4. Keeping in mind that the mouth is the first site of chemical digestion in a human.Your saliva starts the provss of breaking down the food you eat.Keeping this in mind, what organelle do you think would bem numerous inside the cells of your mouth?
ALTERNATIVE: (Use Skin cells from your wrist instead)