Lesson 2 cell membrane and transport

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Lesson 2 cell membrane and transport

  1. 1. Cell membrane TRANSPORT
  2. 2. Membrane Structure
  3. 3. Passive Transport
  4. 4. Difusion O Small molecules like oxygen or carbon dioxide cross the cell membrane. They move towards the side with less concentration in order to equal concentrations.
  5. 5. Osmosis O It is the movement of water across a partially permeable membrane from an area of high water concentration (i.e. dilute solution) to an area of low water concentration (i.e. a concentrated solution)
  6. 6. Practice Activities Order the following cups of water from the most concentrated to the most diluted a b c
  7. 7. Practice Activities Draw the arrows indicating in which direction water will move: Semipermeable membrane
  8. 8. Active Transport O Sometimes the cell needs to take in molecules that are in a smaller concentration in the exterior. Therefore, in order to introduce them into the cell, the cell needs to use energy.
  9. 9. Greater particles Endocytosis Exocytosis
  10. 10. LAB ACTIVITY O Objective: to observe that osmosis takes O O O O place across the cell wall and membrane of plant cells. Hypothesis Context Materials Procedure

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