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Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
Cell Structure And Function
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Cell Structure And Function

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A sample Biology presentation to demonstrate Slide Share.

A sample Biology presentation to demonstrate Slide Share.

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  • 1. Cell Structure and Function Chapter Seven www.nerdscience.com
  • 2. The Discovery of the Cell
    • Robert Hooke – first to see and identify cork “cells.”
    7-1 www.nerdscience.com
  • 3. The Cell Theory
    • Cell Theory:
    • All living things are composed of cells.
    • Cells are the basic units of structure and function in living things.
    • New cells are produced from existing cells.
    Schleiden Schwann Virchow 7-1 www.nerdscience.com
  • 4. Prokaryotes and Eukaryotes
    • Nucleus – large membrane-enclosed structure that contains the cell’s genetic information.
    • Prokaryotes – cells that do not contain nuclei. (Bacteria)
    • Eukaryotes – cells that contain nuclei. (All other organisms)
    7-1 www.nerdscience.com
  • 5. Eukaryotic Cell Structure
    • Organelles – structures in a cell that act like “little organs.”
    • Cytoplasm – the jelly-like fluid where the organelles “float.”
    7-2 www.nerdscience.com
  • 6. Inside the Nucleus
    • Nuclear Envelope – membrane that surrounds the nucleus.
    • Chromatin – consists of DNA wrapped around proteins. “Ball of string”
    • Chromosomes – condensed string-like structure that forms from DNA just before the cell divides.
    • Nucleolus – structure within the nucleus that makes ribosomes.
    7-2 www.nerdscience.com
  • 7. Inside the Nucleus Nuclear Envelope Chromatin Nucleolus 7-2 www.nerdscience.com
  • 8. Ribosomes
    • Ribosomes – made of RNA and protein. Make Proteins!
    7-2 www.nerdscience.com
  • 9. Ribosomes Ribosome 7-2 www.nerdscience.com
  • 10. Endoplasmic Reticulum (ER)
    • Endoplasmic reticulum – internal membrane system of the cell.
      • Lipids, proteins, and other products are made here.
      • Rough ER – has ribosomes
      • Smooth ER – no ribosomes
    7-2 www.nerdscience.com
  • 11. Endoplasmic Reticulum (ER) Rough ER Smooth ER 7-2 www.nerdscience.com
  • 12. Golgi Apparatus
    • Golgi Apparatus – modifies, sorts, and packages proteins.
    7-2 www.nerdscience.com
  • 13. Golgi Apparatus Golgi Apparatus 7-2 www.nerdscience.com
  • 14. Lysosomes
    • Lysosomes – small organelles filled with enzymes.
      • Digest molecules to be used by the cell.
    7-2 www.nerdscience.com
  • 15. Vacuoles
    • Vacuoles – store materials.
    7-2 www.nerdscience.com
  • 16. Vacuoles Vacuoles 7-2 www.nerdscience.com
  • 17. Mitochondria
    • Mitochondria – organelle that converts chemical energy stored in food into compounds that are more convenient for the cell to use.
      • “ Powerhouse of the Cell!”
    7-2 www.nerdscience.com
  • 18. Mitochondria Mitochondria 7-2 www.nerdscience.com
  • 19. Chloroplasts
    • Chloroplasts – organelles that capture energy from sunlight and convert it into chemical energy. ( Photosynthesis )
      • Found only in plants.
    7-2 www.nerdscience.com
  • 20. Chloroplasts Chloroplast 7-2 www.nerdscience.com
  • 21. Cytoskeleton
    • Cytoskeleton – helps cell to maintain shape, move, and move organelles.
    • Centrioles – help organize cell division. Not found in plants.
    7-2 www.nerdscience.com
  • 22. Cytoskeleton 7-2 www.nerdscience.com
  • 23. Cell Boundaries
    • Cell membrane – thin, flexible membrane that surrounds the cell.
    • Cell walls – rigid layer around the membrane found only in bacteria, fungi and plants.
    7-3 www.nerdscience.com
  • 24. Cell Membrane
    • Controls what enters/leaves cell, provides support/protection.
    • Lipid Bilayer – double-layered sheet of phospholipids.
    Two layers! 7-3 www.nerdscience.com
  • 25. Diffusion and Osmosis
    • Diffusion – movement of particles from an area of high to low concentration.
    • Osmosis – the diffusion of water through a selectively permeable membrane.
      • Water will move into/out of a cell to equalize concentrations.
    7-3 www.nerdscience.com
  • 26. Osmosis Practice Cell 90% H2O 10% NaCl 90% H2O 10% NaCl 7-3 www.nerdscience.com Concentrations are equal, so no net movement of water!
  • 27. Osmosis Practice Cell 90% H2O 10% NaCl 80% H2O 20% NaCl 7-3 www.nerdscience.com www.nerdscience.com Concentration of water is greater in the cell than out, so water will move out!
  • 28. Osmosis Practice Cell 80% H2O 20% NaCl 90% H2O 10% NaCl 7-3 www.nerdscience.com Concentration of water is greater outside the cell than in, so water will move In!
  • 29. Facilitated Diffusion and Active Transport
    • Facilitated diffusion – when the plasma membrane “helps” particles pass through protein channels.
      • No energy used.
    • Active transport – when the plasma membrane uses energy to move particles against a concentration gradient.
      • Uses Transport Proteins
    7-3 www.nerdscience.com
  • 30. Facilitated Diffusion and Active Transport 7-3 www.nerdscience.com
  • 31. Organization in Multicellular Organisms Tissues Organs Organ System Organism Cells 7-4 www.nerdscience.com

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