Cell Membrane Transport Mechanisms
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Questions and Answers

What is the primary difference between facilitated diffusion and active transport?

  • The energy requirement for the process (correct)
  • The type of molecules being transported
  • The direction of movement of molecules
  • The polarity of the molecules being transported
  • Which of the following processes is most closely related to the movement of water molecules?

  • Simple diffusion
  • Active transport
  • Facilitated diffusion
  • Osmosis (correct)
  • What is the purpose of facilitated diffusion in a cell?

  • To increase solute concentration
  • To regulate ion balance (correct)
  • To transport large molecules
  • To maintain cell membrane structure
  • Which of the following processes requires a transport protein?

    <p>Facilitated diffusion</p> Signup and view all the answers

    What is the net result of osmosis on a cell?

    <p>Cell swelling</p> Signup and view all the answers

    Study Notes

    Cell Transport Mechanisms

    • The primary difference between facilitated diffusion and active transport is the direction of concentration gradient and energy requirement: facilitated diffusion moves molecules from high to low concentration without energy input, whereas active transport moves molecules from low to high concentration using energy.

    Osmosis

    • Osmosis is the process most closely related to the movement of water molecules, which helps to equalize solute concentrations between two solutions.

    Facilitated Diffusion

    • The purpose of facilitated diffusion in a cell is to speed up the movement of molecules down their concentration gradient, increasing the efficiency of essential cellular processes.

    Transport Proteins

    • Facilitated diffusion requires a transport protein, which forms a channel or binds to the molecule, allowing it to pass through the cell membrane.

    Effects of Osmosis

    • The net result of osmosis on a cell can be isotonic (no change in cell shape), hypertonic (cell shrinks), or hypotonic (cell swells), depending on the solute concentrations inside and outside the cell.

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    Description

    Test your understanding of cell membrane transport mechanisms, including simple diffusion, active transport, facilitated diffusion, and osmosis. Learn about the differences between these processes and their purposes in a cell.

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