Cell Transport Drawing 1. Obtain the “Cell Membrane in Cross Section” paper and a sheet of phospholipids from your teacher. 2. Cut out the phospholipids. Arrange them around areas “A” and “B” and glue them down. Leave “C” and “D” open for now. 3. In this membrane, you will draw an example of diffusion, osmosis, facilitated diffusion, and exocytosis. Follow the directions below to represent each kind of transport in its labeled area: a. Diffusion: Draw O2 molecules so that they would diffuse INTO the cell; draw 10 molecules on one side and 5 on the other; make your oxygen molecules look like the example below; draw arrows through the phospholipids showing how they would move. Write the word “Diffusion” neatly in section A. OO
Oxygen = b. Osmosis: Draw 15 solute molecules on one side and 5 on the other so that the cell is in a hypertonic environment. Then, draw three water molecules in their original locations with arrows showing how they would move across the phospholipids; Write the word “Osmosis: Hypertonic” in section B. Solute = Water = c. Facilitated Diffusion: Draw in a carrier protein as diagrammed on pg. 101 (Figure 5‐5). Pick just one of the four pictures in the diagram. Draw the molecule going INTO the cell. Label the molecule “glucose” and label the carrier protein; Write the word “Facilitated Diffusion” in section C. Glue phospholipids down around your carrier protein. d. Exocytosis: Draw a picture similar to what you see on pg. 106 (Figure 5‐8). Draw the rightmost picture. Label the particles that are released “enzymes”; Write the word “Exocytosis” in section D. 4. Below is a rubric showing how you will be graded. Cell Membrane Category Point Value Diffusion 4 Osmosis 4 Facilitated Diffusion 4 Exocytosis 4 Neatness 4 TOTAL 20