cell_stucture&funtion

cell_stucture&funtion - Cell structure &...

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Chapter 4 & 5
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Outline Cell theory Eukaryote vs Prokaryote Eukaryotic cell Plant vs animal Endomembrane system Cytoskeleton Cell surfaces
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Cells
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Scale of Cells
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Why are cells small? Surface area to Volume ratios
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Cells Exhibit patterns of form and function
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Cell Robert Hooke, 1665 All organisms are composed of similar units of organization, 1839 Schleiden & Schwann
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Cell Theory All known living things are made up of cells The cell is the structural and functional unit of all living things All cells come from pre-existing cells by division Cells contain hereditary information which is passed from cell to cell during cell division All cells are basically the same in chemical composition All energy flow (metabolism & biochemistry) of life occurs within cells
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Cell Categories Prokaryotic cells Eukaryotic cells Domain eukarya “Protist” Plants Fungi animals
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Cell Categories
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Prokaryote Smaller Older Less complex Structural differences No nucleus, have nucleoid No membrane bound organelles Cell wall- glycocalyx
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Eukaryote Larger in size Membrane bound Nucleus Membrane bound organelles
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Evolution of eukaryotic cells from prokaryotic cells Lynn Margulis, 1981 Symbiotic relationship 1.7 BYA Mitochondria from ancient lineage of purple bacteria Chloroplast from ancient lineage of cyanobacteria Origins of Eukaryotic Cells- Endosymbiosis Theory
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Lynn Margulis
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The Cell in a Nutshell
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Extracellular matrix The substance in which animal tissue cells are embedded Matrix structure Proteins polysaccharides Support Adhesion Movement Regulation
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cell_stucture&funtion - Cell structure &...

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