Download Hnrs Bio Reading Guide 3.3

Name: Date: Block: rev. -­‐ 2/4/13 Honors Biology Reading Guide 3.3 1. Sketch & label a phospholipid molecule. 2. What is the relationship between phospholipids & the cell membrane? 3. Why do the charged heads of the membrane arrange themselves so they point point towards the inside or outside of the cell? 4. Using Figure 3.17 as a guide, draw a cross section of the cell membrane. Label the parts &, in a phrase next to the labels, tell what each does. 5. Why is the plasma membrane said to conform to the fluid mosaic model? 6. Describe selective permeability. 7. Describe one important function of the cell membrane. 8. Contrast an intracellular receptor with a membrane receptor.