L5-ANH573w10 - working - 1. From Cells to Tissues - Cell Membrane

L5-ANH573w10 - working - 1. From Cells to Tissues - Cell Membrane

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ANH573 1. Tissues - Cell Membranes 1 From Cells to Tissues: 1. Cell Membranes - Transport
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ANH573 1. Tissues - Cell Membranes 2 Required Reading Textbook Essentials of Human Anatomy and Physiology , 8 th ed, by Marieb. Chapter 3 Part 3
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ANH573 1. Tissues - Cell Membranes 3 Lecture Outline From Cells to Body Cell Interactions Plasma Membrane: A Closer Look Fluid Mosaic Model Movement of Molecules Across Cell Membranes The Selectively Permeable Plasma Membrane Transport Across Plasma Membrane Passive Transport Diffusion, Osmosis, Ion Channels, Facilitated Transport Active Transport Pumps, Vesicles, Phagocytosis
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4 From Cells to Body In multicellular organisms: Adjacent cells interact Interacting cells function as communities Communities of cells co-operate 8-cell stage of human development Week 18 of human development
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5 Cell Interactions Cells interactions are mediated through their plasma membranes adhesions between cells cell-to-cell contact various types with specific actions communication between cells transport of materials between cells and to & from environment
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6 Portion of Trachea: Made of tightly packed epithelial and goblet cells. Goblet cells make and secrete mucus to keep trachea moist. Epithelial cells use their cilia to propel the mucus toward the mouth. cilia goblet cell with mucous epithelial cell nucleus
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7 Plasma Membrane – Phospholipid bilayer with attached or embedded proteins and cholesterol Phospholipids Polar heads Non-polar tails Form spherical bilayer when placed in water Different proteins have different functions Adhesion Transport Reception Enzymes Selectively permeable (semipermeable) Fluid Mosaic Plasma Membrane Model http://www.youtube.com/watch?v=ULR79TiUj80 (1.27 minutes)
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ANH573 1. Tissues - Cell Membranes 8 Organization of Lipid Molecules in Cell Membranes Organize into micelles and bilayers when in aqueous solutions Hydrophobic tails “ hide
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9 Lipid Bilayer is “Self-Sealing” Constant spontaneous re- arrangement of lipid molecules To ‘ hide ’ hydrophobic tails that become exposed Prohibition of Free Edges Leads to formation of a boundary around a closed
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This note was uploaded on 01/31/2011 for the course BIO 210 taught by Professor S during the Spring '10 term at University of Toronto- Toronto.

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L5-ANH573w10 - working - 1. From Cells to Tissues - Cell Membrane

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