1. AGENDA – 10/6/15  Take out your journal and take out your outline from yesterday! Bell-Ringer: Membrane Finish Plasma Membrane Notes Play Doh Membrane!

2. Bell-ringer: 10/6/15 1.Describe what the plasma membrane is and where it can be found (where in/on the cell and what types of cells)? 2.What is the job of the plasma membrane?

3. 2.1 Section Objectives – page 35 Identify the structure and function of the cell’s plasma membrane Today’s Objective:

4. Summary Section 2 – pages 175-178 There are watery environments inside and outside the cell. Therefore the phospholipid layers look like a sandwich, with the head ends facing the watery environments they are attracted to, and the tail ends being the inside of the sandwich, away from the water. PLASMA MEMBRANE

5. Summary Section 2 – pages 175-178 The cholesterol prevents the fatty acid chains of the phospholipids from sticking together. Cholesterol Molecule PLASMA MEMBRANE

6. Summary Section 2 – pages 175-178 PLASMA MEMBRANE Transport Protein Proteins also span the entire plasma membrane. Transport Proteins help the membrane be selectively permeable. They move ‘selected’ substances through.

7. Summary Section 2 – pages 175-178 PLASMA MEMBRANE Plasma membrane Transport protein

8. Summary Section 2 – pages 175-178 The fluid mosaic model describes the plasma membrane as a flexible boundary of a cell. The phospholipids move within the membrane. PLASMA MEMBRANE

9. Summary Section 2 – pages 175-178 “Fluid” because it moves like currents in a lake. PLASMA MEMBRANE “mosaic” because the proteins that are found throughout the membrane create a mosaic-type pattern on the surface.

10. PLASMA MEMBRANE PLAYDOH INSTRUCTIONS 1.You will make a playdoh model of the plasma membrane. Person A.- is responsible for creating 6 phospholipids- make a phospholipid bi-layer with 3 on the top and 3 on the bottom. Person B.- is responsible for making a transport protein and adding it to the phospholipid bi-layer. Person C.- is responsible for making 2 cholesterol molecules and adding them to the bi-layer. 2.Using a pen or pencil: Person A.- Underneath the cell membrane model, write the definition of the plasma membrane and in which cells it can be found. Person B.- Label the transport protein and write it’s function. Person C.- Label the cholesterol molecules and write their function. 3. On the colorful printer paper, away from the model: Person A- Compare the function of the plasma membrane to something else in the world that has the same function. Person B- Describe what would happen if the transport proteins were not working properly. Person C- Describe what would happen if the cholesterol molecules were not working properly. Drawings of the plasma membrane can be found in Chapter 7.2