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Bell Ringer

Bell Ringer. Challenge: See if you can draw and label the cell membrane with no notes!. Membrane Transport. Lesson Overview: Observe the incredible eggs Brief PowerPoint on transport Gummy Bear Osmosis Lab Membrane video Murky and Main Points. Incredible Eggs. Diffusion.

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Bell Ringer

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  1. Bell Ringer • Challenge: See if you can draw and label the cell membrane with no notes!

  2. Membrane Transport Lesson Overview: • Observe the incredible eggs • Brief PowerPoint on transport • Gummy Bear Osmosis Lab • Membrane video • Murky and Main Points

  3. Incredible Eggs

  4. Diffusion • Is a type passive transport • Is the movement of substances from an area of high concentration to low concentration • no energy required

  5. LE 7-11a Molecules Membrane (cross section) WATER Net diffusion Net diffusion Equilibrium Diffusion of one solute • Solute - a substance dissolved in another substance. Ex: dye molecules in water.

  6. LE 7-11b Net diffusion Net diffusion Equilibrium Equilibrium Net diffusion Net diffusion Diffusion of two solutes

  7. Real life connection: Sickle Cell Anemia • Oxygen diffuses in and out of normal blood cells. Can’t in abnormal shaped cells. • Estimated 100,000 Americans have sickle cell disease. • 1 in 12 African Americans have sickle cell trait. • Means that they can pass the trait to children

  8. Osmosis • Is diffusion of water across a membrane • Moves from an area of its high concentration to an area of its low conc. • Is energy required?

  9. OsmosisExample Water Water & Salt www.fmhs.uaeu.ac.ae Water Moves Water Moves until there is the same # of water molecules on each side

  10. Osmosis Terms • Hypertonic • solution with high concentration of solute • Solute – a substance dissolved in water. Ex: salt • Hypotonic • solution with low concentration of solute • Isotonic • solutions with the same solute concentration

  11. Osmosis Effects on Cells When a cell is placed in a Hypotonic solution: Cell gains water through osmosis When a cell is placed a Hypertonic solution: Cell loses water through osmosis

  12. Effects of Osmosis on Cells

  13. Video • http://youtu.be/2UPqLm-uDnI

  14. Murky and Main Points • Write 3 main points from today’s lesson. Must be content-based. • Ex: The plasma membrane is selectively permeable to control what is allowed in and out of the cell. • Write 1 or more murky points from today’s lesson. This is material that is unclear to you. • Write 1 favorite point from today’s lesson. What did you enjoy about class today?

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