2 A. Cell Membrane1. The cell membrane regulates what enters and leaves the cell and also provides protection and support.
3 A. Cell Membrane2. Nearly all cell membranes are made up of two layers of lipids called the lipid bilayer.
4 A. Cell Membrane3. Scientists describe the function of the cell membrane as the “Fluid Mosaic Model”animation
5 B. Cell Walls1. Main function is to provide the cell with support and protection.2. Found in plants, algae, fungi, and many prokaryotes.
6 Cell WallCell MembraneLocated in all cellsAllows materials to pass throughProvides strong support
7 C. Diffusion through Cell Boundaries 1. Concentration of a solution is the mass of the solute in a given volume of solution.Mass/VolumeExample: Which is more concentrate?4 grams/Liter or 2 grams/Liter
8 C. Diffusion through Cell Boundaries 2. Diffusion is the process by which molecules move from an area of high concentration to an area of low concentration.
9 C. Diffusion through Cell Boundaries 3. When the concentration is the SAME throughout a system, the system has reached equilibrium.
10 C. Diffusion through Cell Boundaries 4. Diffusion depends on random particle movements so the cell doesn’t have to use any energy!P,5 needs videovideo
11 D.Osmosis1. Diffusion of water through a selectively permeable membrane.P 6 start here
12 D. OsmosisIf you are stranded on a desert island with no water to drink, you are faced with one decision.To drink the sea water or not to drink the sea water?In one sentence, make a choice and explain your decision.
13 D.Osmosis 2. Types of solutions Isotonic- “same strength” Hypertonic- “above strength”Hypotonic- “below strength”GIF, video