INTRODUCTION TO THE LIGHT MICROSCOPE

Transcription

1 Name: INTRODUCTION TO THE LIGHT MICROSCOPE 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. The virtual microscope is a little more complicated than the microscope we used in the lab, but with patience, you should be able to complete this activity. 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. a. How many objectives are on the virtual microscope? b. What are the numbers listed on each of the objectives? 2. You will be looking at the slide (top right) labeled "letter e". Follow the tutorial and use the microscope adjustments to focus the "e" on each of the objectives. Draw the "e" exactly as it appears Scanning (4) Low (10) High (100) 3. Which letter on the microscope points to the

2 OCULAR COARSE ADJUSTMENT FINE ADJUSTMENT STAGE CENTERING 4. Now view several microscope images of "common things". Go to After viewing the images, go to the quiz. Write down the names of the specimens for each letter. A. B. C. D. E. F. G. H.

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4 Virtual Microscope Lab - Cheek Cells Name: 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)

5 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. eukaryote nucleus cell membrane cytoplasm 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?)

6 Plant Cells Internet Lab 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. 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 onion. Sketch the image at Scanning, Low and High Power. LABEL on high power the CELL MEMBRANE, CYTOPLASM, and NUCLEUS. Scanning (4) Low (10) High (100)

7 Animal Cell Coloring Name: Cell Membrane(light brown) Nucleolus (black) Mitochondria (orange) Cytoplasm (white) Golgi Apparatus (pink) Lysosome (purple) Nucleoplasm (pink) Cilia (yellow) Microtubules (dark green) Nuclear Membrane(dark brown) Rough Endoplasmic Reticulum (dark blue) Ribosome (red) Smooth Endoplasmic Reticulum( light blue) II. Briefly describe the function of the cell parts. 1. Cell membrane

8 2. Endoplasmic Reticulum 3. Ribosome 4. Golgi Apparatus 5. Lysosome 6. Microtubule 7. Mitochondria 8. Nucleus

9 Name: Date: Plant Cell Coloring Cell Membrane (orange) Nucleoplasm (yellow) Mitochondria (red) Vacuole (light blue) Chromosomes (gray) Cell Wall (dark green) Nucleolus (brown) Chloroplasts (light green) Ribosome (purple) Cytoplasm (white) Golgi Apparatus (dk blue) Smooth Endoplasmic Reticulum (pink) Rough Endoplasmic Reticulum (pink) Analysis

10 1. Name two things found in a plant cell that are not found in an animal cell: 2. How does the shape of a plant cell differ from that of an animal cell? 3. What is the function of the chloroplasts? 4. What is the function of the vacuole?