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Understanding Cellular Structure and Function: The Fundamentals of Cell Theory

This overview explores the basics of cellular structure and function, focusing on cell theory. It highlights that all organisms are made of one or more cells, which serve as the basic unit of structure and organization. The section discusses different types of microscopes, such as light and electron microscopes, and their magnification capabilities. Moreover, it differentiates between prokaryotic and eukaryotic cells, emphasizing structural complexity and organelles, while detailing the role of the plasma membrane in nutrient absorption and waste removal.

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Understanding Cellular Structure and Function: The Fundamentals of Cell Theory

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  1. Cellular Structure and Function Section 1 Cell Discovery and Theory The Cell Theory • All organisms are composed of one or more cells. • The cell is the basic unit of structure and organization of organisms. • All cells come from preexisting cells.

  2. Cellular Structure and Function Section 1 Cell Discovery and Theory Light Microscopes • Utilizes a series of glass lenses and visible light to magnify an image • Magnifies images up to 1,000 times the actual size CMCD/Getty Images

  3. Utilizes magnets to aim a beam of electrons at Cellular Structure and Function a cell to produce an image Section 1 Cell Discovery and Theory Electron Microscopes • Magnifies images up to 500,000 times the actual size MedicalRF.com/Getty Images

  4. Cellular Structure and Function Section 1 Cell Discovery and Theory Prokaryotic Cell • Simple structure • Contains a plasma membrane • Does not contain membrane-bound organelles Steven P. Lynch

  5. Cellular Structure and Function Section 1 Cell Discovery and Theory Eukaryotic Cell • More complex structure • Contains a plasma membrane • Contains membrane-bound organelles The McGraw-Hill Companies, Inc./Al Telser, photographer

  6. Cellular Structure and Function Section 1 The Plasma Membrane Plasma Membrane • Thin, flexible boundary between the cell and its environment • Allows nutrients into the cell • Allows waste to leave the cell

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