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.

01/16/14

prepared slides of cells (nerve cell, muscle cells, red blood cells, guard cells, xylem and phloem in roots, etc.

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.

Sample notebook writing:Scientific Investigation

1) Problem 2) Hypothesis 3) Procedure 4) Materials 5) Data 6) Results 7) Conclusion 8) Application

1/27/2014

Cell Structure and Function Investigation

1) Problem: What did each organism have in common with the others? Were all of the cells observed the same shape? Why do cells have different shapes? Is the structure of something related to its function? What are the functions of the cells you observed? Do all cells contain a nucleus? What is the difference between eukaryotic and prokaryotic cells? What type of cell requires photosynthesis and what organelle processes photosynthesis? What do plant cells have that animal cells do not? Draw a virus cell, bacteria cell, an amoeba and label.

2) Hypothesis: If cells are different, then I will see that evidence in my drawings using labels to identify organelles. If cells have a specific function, then I will write what it does.

3) Procedure: Following proper use procedures for a microscope and glass and electrical safety rules, I will record additional statements and make detailed drawings in my science notebook for every slide I investigate. Each drawing will be labeled with the magnification used and the identification of the specimen. (include color, shapes)

4) Materials: microscope, prepared slides from a variety of organisms, notebook, pencil, map pencils

5) Data: 1. Human Cheek Cells (400x, red stain):

(Continue will all slides numbered and labeled and draw.) 6) Results: Cells are different, so I drew that evidence in my notebook using

labels to identify organelles. Cells have a specific function, and I will wrote what evidence in my notebook.

7) Conclusion: (answer all questions from Problem) 8) Application: I will use my skills and knowledge from this lab in viewing cells

and cell organelles to pass my test.

Sample of Drawing and labeling for Human Cheek Cell

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

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.

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)

What are the functions of the cells you observed? How does the shape

of the cell help the cell function?

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

Take some notes in your notebook…

Each cell has a specific function within an organism.

Write in your notebook…