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Homeostasis and transport (part 1)
Homeostasis and transport (part 1)
Homeostasis and transport (part 1)
Homeostasis and transport (part 1)
Homeostasis and transport (part 1)
Homeostasis and transport (part 1)
Homeostasis and transport (part 1)
Homeostasis and transport (part 1)
Homeostasis and transport (part 1)
Homeostasis and transport (part 1)
Homeostasis and transport (part 1)
Homeostasis and transport (part 1)
Homeostasis and transport (part 1)
Homeostasis and transport (part 1)
Homeostasis and transport (part 1)
Homeostasis and transport (part 1)
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Homeostasis and transport (part 1)

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  • 1. Biology I: Homeostasis and Transport (Part 1) Mr. Nettles
  • 2. Agenda – Tuesday, Sept. 13, 2011
    • Warm-Up (7 min)
    • Today’s Agenda (3 min)
    • Lesson (25 min)
    • Wrap-Up (5 min)
    • Review- Biomolecules (15 min)
  • 3. Warm-Up (Bonus!!)
    • Which molecules store and transmit genetic information?
    • a) lipids, b) proteins, c) nucleic acids, d) carbohydrates
    • Antibodies are composed primarily of amino acids. In which class of biomolecules would antibodies belong?
    • a) lipids, b) proteins, c) nucleic acids, d) carbohydrates
    • Which cell structures cause the outer surface of the endoplasmic reticulum to appear rough?
    • a) ribosomes, b) proteins, c) the mitochondria, d) the Golgi
  • 4. Warm-Up (Bonus!!)
    • Which molecules store and transmit genetic information?
    • a) lipids, b) proteins, c) nucleic acids , d) carbohydrates
    • Antibodies are composed primarily of amino acids. In which class of biomolecules would antibodies belong?
    • a) lipids, b) proteins , c) nucleic acids, d) carbohydrates
    • Which cell structures cause the outer surface of the endoplasmic reticulum to appear rough?
    • a) ribosomes , b) proteins, c) the mitochondria, d) the Golgi
  • 5. Today’s Objectives
    • I will define: homeostasis, semi-permeable, concentration, and equilibrium .
    • I will describe three types of passive transport .
  • 6. Homeostasis
    • Cells must maintain a stable internal environment .
          • having the right amount of water and nutrients
          • getting rid of wastes
          • staying at the right temperature
    • Homeostasis = the ability to maintain a stable internal (inside) environment
  • 7. Think!!
    • What does the cell membrane do?
  • 8. Moving Across the Cell Membrane
    • The cell membrane is semi-permeable meaning some things can go across and others can’t.
    • Concentration = how crowded a certain location is with molecules
  • 9. What’s happening in this picture? semipermeable
  • 10. Equilibrium
    • Equilibrium:
    Both sides are equal Nature wants equilibrium!
  • 11. Passive Transport
    • The movement of materials in and out of the cell without using energy is called passive transport .
    • There are 3 types of passive transport:
      • Diffusion
      • Facilitated diffusion
      • Osmosis
  • 12. Diffusion
    • Molecules move from areas of high concentration to areas of low concentration.
    • Molecules move to areas that are less crowded.
  • 13. Think!!
    • When is equilibrium reached?
  • 14. Facilitated Diffusion
    • Diffusion that involves a protein channel or carrier
      • Does NOT use energy
  • 15. Wrap-Up
    • What is homeostasis?
    • True or False?
    • Passive transport is the moves materials in and out of the cell using energy.
    • List the three types of passive transport.
  • 16. Review: Biomolecule Bingo
    • This is a chance to earn 5% points of Friday’s Quiz!!
    • Listen carefully to the “bingo clues” and write down the name of the biomolecule related to the clue.
    • Carbohydrates, Lipids, Proteins, Nucleic Acids

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