1. Warm Up Name the organelle that… 1. Is a network of proteins that supports and gives shape to the cell 2. Processes and delivers proteins 3. Is located in the cytoplasm and on the rough endoplasmic reticulum 4. Contains enzymes that break down damaged cell parts 5. What is the main difference between plant and animal cells?

2. Page 75 Questions

3. Cell Membrane (3.3) Cell membranes are made of a phospholipid bilayer. 1. Form a boundary between inside and outside of the cell 2. Controls passage of materials cell membrane

4. Phospholipid Hydrophilic (likes water) head Hydrophobic (doesn’t like water) tails

5. Cell Membrane Other molecules such as proteins, carbohydrates, and cholesterol are embedded in the membrane

6. Fluid Mosaic Model Membrane behaves like a fluid, but proteins do not flip vertically

7. Selective permeability The cell membrane is selectively permeable Some molecules can cross the membrane while others can not.