Students will extract DNA from their own cheek cells.
For the Onion Skin Cell Peel off a small section of onion skin Place the onion skin in the centre of the slide Place the two drops of water on the onion skin. Touch the opposite edge of the cover slip with a paper towel to draw the stain under the slip Place the slide on the stage under low power.
Use the coarse adjustment knob to focus Rotate the nosepiece to medium power. Use the fine adjustment knob to focus. Observe what you see Repeat step 8, but this time switch to high power and draw what you see use a pencil After you draw your diagrams, rotate the nosepiece back to low power.
Remove the slide and dispose of the piece of onion, and wash the slide and cover slip For the Cheek Cell Take a clean toothpick and gently scrape the inside of your cheek Prepare a wet mount like in steps Instead, use the methylene blue solution as the dye Observations When observing the onion skin cell, we noticed that the cells took on a brick-like structure and within the cells, small dots the nuclei can be seen.
When we viewed the onion skin cells at X total magnification, we noticed the nuclei of the cells looked clearer and larger and we were able to study the cell with more understanding than when we used the first magnification.
The organelles that we were able to see in this type of cell were the nucleus, the cytoplasm and the cell wall.
|Human Cells and Microscopy||Differential Interference Contrast Image Gallery Human Cheek Epithelial Cells The tissue that lines the inside of the mouth is known as the basal mucosa and is composed of squamous epithelial cells. These structures, commonly thought of as cheek cells, divide approximately every 24 hours and are constantly shed from the body.|
|Expert Answers||Moreover, to avoid breaking the slide and damage to the microscope objective lenses during observation, it is important that the optical tube be lowered to the point that the objective lens is as close to the slide as possible.|
|User login||Add 2 drops of iodine to the center of a glass slide. Take a small piece of onion.|
Unlike the onion skin cells, the cheek cells were more spread out from each other and they all had a round shape. When we viewed the cheek cells at 40X total magnification, we noticed that the cells were secluded and spread out see diagram provided.
At X total magnification, we were only able to view one cell at a time, due to the fact that the cells were separated from each other. The organelles that were visible in this type of cell were the nucleus, the cytoplasm and the cell membrane. Aside from the actual cells, we were able to see air bubbles within both the onion skin cell slide and the cheek cell slide.
Conclusion Furthermore, my stated hypothesis is somewhat correct and incorrect.
I stated that all cells will be together in a large group, but now I realize that the statement was incorrect. Only the plant cells were together in a large group. The animal cells, however, were secluded, thus proving the statement wrong.
I stated that both the cells were about 0. A correct statement in my hypothesis was that most of the important organelles are visible through the microscope.
The important organelles that can be seen are the cell wall for the plant cellsthe cell membrane, the nucleus, and the cytoplasm. We can see those organelles due to the fact that they are the largest organelles in the cell and also due to the dye which brought them out.
The final statement in my hypothesis was that the overall image will not be clear enough for further detail. Overall, I have learned that onion skin cells plant cells are rectangular and are always with other plant cells and cheek cells animal cells are circular and are secluded from each other, and that the smaller organelles cannot be seen with just our school microscope.
Applications Knowing that certain cells are different from other cells is important in our world for many reasons. The cell is the most basic unit of life and knowing about it will help us answer many different questions.
If someone knows about the cell and how it works they could find a way to counteract viruses and illnesses, thus creating medicine and a way to cure the virus or illness. We should know about the cell because it helps us understand that every cell has an individual job to fulfill and those cells let us do what we can do now.
Discussion The cheek cell, an example of an animal cell, generally has a circular, oval shape. Due to the fact that the cheek cell was not in groups or clumps, the arrangement of this type of cell is unknown.
From previous labs, I remember that the cells were pushed together completely; each cell fitted beside another cell perfectly and so on. The animal cell structure is the most prominent in human cheek cells. The onion skin cell, an example of a plant cell, generally has a rigid, rectangular shape.
The onion skin cells were positioned beside each other length touching length, width touching width and formed a checkered pattern. Also, like the cheek cell, the onion skin cells were pushed together so that no spaces were in between.When you view a "cheek cell" scraping through a microscope on high power, you will see many cells that have been overlapped or rolled up.
When you find one or a group of cells, each cell will have an irregular edge and a distinct nucleus in its center. Purpose: The purpose of this experiment is to determine and observe the difference between an animal cell (cheek cell) and a plant cell (onion cell). Also the purpose was to try to determine if one can see the cell better with water or methylene blue under a microscope.5/5(1).
Students observe similarities and differences in the structures of these 2 cell types as they view 5 different microscope slides: human cheek cells, Amphiuma liver, cork, onion bulb epidermis, and privet leaf.
Includes teacher's manual with student guide. How to make a Cheek Cell slide: 1. Gently scrape the inside lining of your cheek with a clean toothpick. 2. Smear toothpick onto clean glass slide. 3. Add 1 drop of methyl blue stain. 4. Place cover slip over stain. 5. Under the compound microscope, locate and observe your cheek cells under low, medium and high power.
Do they look like the. Cell Lab. Learning Objectives. With the unaided eye, one can only see exceptionally large cells, such as the human ovum, which has a diameter of µm.
Therefore, we must use a microscope to visualize cells in a tissue. Microscope images in this course come from the light microscope (magnification up to x) and the electron.
Human Cells and Microscopy. Cheek cells are fairly easy to observe, simply take a flat toothpick and rub it on the inside of the cheek. Swirl the toothpick in a drop of methylene blue on a microscope slide.