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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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solute vs solvent
Solute vs. Solvent
  • Solute = substance to be dissolved
  • Solvent = substance doing the dissolving
  • Solute + solvent = solution
passive transport1
Passive Transport
  • NO input of cellular energy required!
  • Molecules move from high concentration to low concentration
    • “Down the concentration gradient”
what diffuses into and out of cells
What diffuses into and out of cells?
  • Atoms
  • Small molecules
  • Non-polar molecules
  • Examples?
slide9

This membrane is NOT permeable to sugar

30% Sugar

___% Water

70% Sugar

___% Water

terms to compare solutions
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)
slide12

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