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*Warm Up* In your journal… • Title page 41: 2.1 SPMS • Title pages 42-44: Cell Transport Warm Ups • Title pages 45-46: Cell Membrane Notes •Go to Moodle •Cellular Transport Toggle •Open Journal Checklist #1 0Open Cell Membrane Cornell Notes Outline. 0Copy the outline down on pages 45-46. As we take notes, highlight: The headings Vocabulary words Important info A. Characteristics of the Cell Membrane 1. 2. 3. 4. His friends call him the plasma membrane He is thin and flexible Surrounds ALL cells Fluid-Mosaic Model 4. Fluid-Mosaic Model? a. The cell membrane is NOT a rigid structure with immovable components! b. The cell membrane is fluid-like and flexible c. Within the membrane, molecules can move around B. Functions of the Cell Membrane 2 main functions: 1. Protection – protects the cell from the outside environment 2. Regulation – controls what can enter and exit the cell a. He is selectively permeable: permeate is a fancy way to say “pass through.” b. maintains homeostasis 1. homeostasis = state of equilibrium in the body What Is the Cell Membrane Made of? C. Structure Cell membrane is an organelle made up of biomolecules. 1. Phospholipids make up the majority of the cell membrane a. Hydrophilic heads (polar) are made of phosphates (Phospho) b. Hydrophobic tails (nonpolar) made out of fatty acids (Lipid) Structure c. To protect the hydroPHOBIC tails from water, they form a bilayer which keeps the tails inside and the water- loving heads outside. 2. Protein molecules bring materials into the cell and receive signals from outside the cell a. ex: glucose, amino acids, ions, and water b. O2 and CO2 can pass through freely 3. Carbohydrate molecules (attached to proteins or lipids) have antenna to help cells identify or recognize other cells 4. Cholesterol (lipid) that is found in the fatty acid tails helps the cell membrane maintain it’s flexible shape. Video https://www.youtube.com/watch?v=LKN5sq5dtW4 Work Time • Finish Cell membrane coloring • Answer side questions on notes.