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Download Aim - What is the fluid mosaic model?
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Transcript
Aim - To explain the fluid mosaic model Do Now: Describe what is meant by a mosaic. Articles • http://biology.about.com/od/cellanatomy/ss/ cell-membrane.htm • http://www.biology4kids.com/files/cell_mem brane.html Cell membrane • Selective Permeability- the membrane is “selective” it allows some substances in but keeps others out. Let me introduce you to .. A phospholipid Loves water Phosphate group (Hydrophilic) Fatty acid chains Hates water (Hydrophobic) Task-1 1. Work out how a load of phospholipids would arrange themselves in a wet environment. Task-2 1. Work out how a load of phospholipids would arrange themselves in a wet environment. 2. Add some cholesterol within the membrane Task-2 1. Work out how a load of phospholipids would arrange themselves in a wet environment. 2. Add some cholesterol within the membrane Task-3 3. Add some proteins on either side and through Task-3 3. Add some proteins on either side and through Task-4 Add some sugars to some of the proteins and some sugars to some of the fats Task-4 Add some sugars to some of the proteins and some sugars to some of the fats Glycoprotein Glycolipid Outside inside Cell Membranes Lesson-1 The Fluid Mosaic Model Task-4 Add some sugars to some of the proteins and some sugars to some of the fats Glycoprotein Glycolipid Cell Membranes Lesson-1 The Fluid Mosaic Model Question Could it look like a mosaic? Glycoprotein Glycolipid Cell membranes • https://www.youtube.com/watch?v=Pfu1DE9 PK2w Activity • Read Along- Reading Essentials • Build a cell membrane with play-dohdemonstrate the fluid mosaic model • Make sure you include the phospholipid bilayer and the substances that can be found floating in the membrane. Regents Question • • • • • A function of cell membranes in humans is the (1) synthesis of the amino acids (2) production of energy (3) replication of genetic material (4) recognition of certain chemicals Homework • Explain the structure of the cell membrane and the fluid mosaic model in a fully developed paragraph. Homework The fluid mosaic model The term fluid refers to the fact that molecules move very freely within each layer. Glycoprotein Glycolipid Molecules rarely change sides
