Tonicity in Chemical Biology
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Questions and Answers

What is tonicity a measure of in chemical biology?

  • Permeability of a cell membrane
  • Effective osmotic pressure gradient (correct)
  • Concentration of solutes inside a cell
  • Water potential of a solution

    • How does tonicity differ from osmotic pressure?

  • Osmotic pressure depends on the direction of osmotic flux
  • Osmotic pressure is affected by solutes that can freely cross the membrane
  • Tonicity is influenced only by solutes that cannot cross the membrane (correct)
  • Tonicity is solely determined by water potential

    • What determines the direction and extent of osmotic flux in tonicity?

  • Pressure exerted by the solutes
  • Relative concentration of selective membrane-impermeable solutes (correct)
  • Temperature of the solutions
  • Size of the solute particles

    • Which solution is considered hypertonic?

    <p>A solution with greater concentration of non-permeating solutes than the cytosol inside the cell</p> Signup and view all the answers

    Why do solutes able to freely cross the membrane not affect tonicity?

    <p>They will always equilibrate with equal concentrations on both sides without net solvent movement</p> Signup and view all the answers

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