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Understanding Passive Transport: Cell Membrane's Selective Permeability

Learn about passive transport through the cell membrane without energy input - diffusion and osmosis, leading to equilibrium.

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Understanding Passive Transport: Cell Membrane's Selective Permeability

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  1. Chapter 2Section 3 Life Science

  2. THE Cell Membrane • Cells survive by allowing some items to pass through the cell membrane. • ***Cell Membrane is “Selectively Permeable” • Selectively Permeable- “selects” certain materials to go in and out of the cell membrane.

  3. 2 types of Movement through the Cell Membrane: • Passive Transport- does not require energy to pass through cell membrane • Active Transport-requires energy

  4. FOCUS:Passive Transport • The movement of substances through the cell membrane without the input of energy is called Passive Transport. • There are three types of Passive Transport that can occur.

  5. 1st Type of Passive Transport • Diffusion-movement of “materials” from an area of high concentration to low concentration. • Examples- Febreeze • Oxygen and Carbon Dioxide molecules moving across membrane

  6. EQUILIBRIUM • Ending Result- Equilibrium • This is when it’s EQUAL on both sides • BALANCED!!!

  7. 2nd Type of Passive Transport • Osmosis-movement of water from an area of high concentration to low concentration • Examples- Wilting Plant (needs H2O)

  8. EQUILIBRIUM • Ending Result... Equilibrium • This is when it’s EQUAL on both sides • BALANCE!!!

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