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Passive Transport

Passive Transport. Solute vs. Solvent. Solute = substance to be dissolved Solvent = substance doing the dissolving Solute + solvent = solution. What is dynamic equilibrium?. Passive Transport. NO input of cellular energy required!

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Passive Transport

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  1. Passive Transport

  2. Solute vs. Solvent • Solute = substance to be dissolved • Solvent = substance doing the dissolving • Solute + solvent = solution

  3. What is dynamic equilibrium?

  4. Passive Transport • NO input of cellular energy required! • Molecules move from high concentration to low concentration • “Down the concentration gradient”

  5. Diffusion

  6. What diffuses into and out of cells? • Atoms • Small molecules • Non-polar molecules • Examples?

  7. Osmosis

  8. This membrane is NOT permeable to sugar 30% Sugar ___% Water 70% Sugar ___% Water

  9. Terms to compare solutions • Isotonic = solute and solvent concentrations are equal • Hypotonic = solution with less solute (more water) • Hypertonic = solution with more solute (less water)

  10. Beaker A Beaker B Beaker C 100 % Water ____% Sugar 40% Sugar 90% Water ___% Water • What is the solute concentration of Beaker B? • What is the solvent concentration of Beaker C? • What would the solvent concentration be for a solution that is isotonic to Beaker B?

  11. Facilitated Diffusion

  12. What is moved via facilitated diffusion? • Water • Amino acids • Glucose • Nucleotides

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