Cell Structure and Function

1. 01/16/14 Cell Structure and Function Today, we will continue our study of cells using the microscope. In your science notebooks, complete detailed drawings of the cells you observe. Make sure you are labeling your drawings with the magnification used and identification of the type of cell. prepared slides of cells (nerve cell, muscle cells, red blood cells, guard cells, xylem and phloem in roots, etc.

2. Cell Structure and Function Lab – Scientific Investigation Model in your Notebook (the 8 steps). First you need to set up your notebooks showing the date, title, and the first 5 steps, and have me check them: Then, you may work at a scope, check your lab procedures (instructions) to view and draw the specimens.

3. Sample notebook writing:

4. Sample of Drawing and labeling for Human Cheek Cell

5. Additional learning for understanding… Individual web research: Use a website of your choosing to see variation in the size and shape of cells. Make detailed notes in your Science notebook of your findings. Search: Animal Cells; Plant Cells, microscope slide preparation, Organization of cells, Bacteria, virus, ameoba

6. Ask students to write a short reflection on their observations of the cells shown on the websites. This can be done in their notebooks. Ask students to reflect on the following questions:1)Were all of the cells you observed the same shape? Explain yourobservations. 2) Why do cells have different shapes? Begin by asking students if the shape of a cell is directly related to the function of that cell. Conclude by asking students to write a detailed description of one of the cells observed. In the description, they should include the shape, color, and size of the cell. If students know what the cell does, they should include the function in the description. If not, use the internet to find out the function.

7. Begin by calling on a few students to share their notebook entries. You may also allow students to display their entry on their desk and conduct a brief gallery walk. Activity: Instruct students to work with their elbow partner to define and illustrate each term, Structure and Function, in their science notebooks. When students have finished, ask for a few volunteers to share their definitions. Ask: Is the structure of something related to its function? What are some examples? (A wheel is round, so it rolls; the hoof of a horse helps it run faster; the shape of a wing helps in flight)

8. What are the functions of the cells you observed? How does the shapeof the cell help the cell function? Take some notes in your notebook… Consider the following examples: *A nerve cell has a nerve body and axons, which transmit and receive information. *Muscle cells are long and thin. When they contract, they are able to move bones. *Red blood cells are smooth and circular to travel through the blood vessels easily as they carry oxygen to the cells of the body. *Guard cells are shaped to close to keep the leaf from losing water. They open to allow water vapor to escape

9. Write in your notebook… Each cell has a specific function within an organism.