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Cellular Structure and Function

Cellular Structure and Function. Section 1: Cell Discovery and Theory. Section 2: The Plasma Membrane. Section 3: Structures and Organelles. Section 4: Cellular Transport. Cellular Structure and Function. Section 1. Cell Discovery and Theory. The Cell Theory.

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Cellular Structure and Function

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  1. Cellular Structure and Function Section 1: Cell Discovery and Theory Section2: The Plasma Membrane Section 3: Structures and Organelles Section 4: Cellular Transport

  2. 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.

  3. 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

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

  5. 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

  6. 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

  7. 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

  8. Cellular Structure and Function Section 2 The Plasma Membrane Selective Permeability • The plasma membrane controls the movement of substances into and out of the cell. Plasma Membrane • Controls the amount of a substance entering the cell • Controls the amount of a substance leaving the cell

  9. Cellular Structure and Function Section 2 The Plasma Membrane • The plasma membrane is composed of the phospholipid bilayer. • A phospholipid molecule is composed of a glycerol backbone, two fatty acid chains, and a phosphate group.

  10. Cellular Structure and Function Section 2 The Plasma Membrane Fluid Mosaic Model • The phospholipid bilayer allows other molecules to “float” in the membrane. Other Components • Proteins • Cholesterol • Carbohydrates

  11. Cellular Structure and Function Section 2 The Plasma Membrane Proteins • Transmit signals inside the cell • Act as a support structure • Provide pathways for substances to enter and leave

  12. Cellular Structure and Function Section 2 The Plasma Membrane Cholesterol • Prevents fatty acid tails from sticking together

  13. Cellular Structure and Function Section 2 The Plasma Membrane Carbohydrates • Identify chemical signals

  14. Cellular Structure and Function Section 2

  15. Cellular Structure and Function Section 3 Structures and Organelles Plant and Animal Cell Structures Plant Cell Animal Cell Cellular Pursuit

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