Cell Transport Mechanisms Quiz
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Questions and Answers

What is passive transport?

  • Requires ATP or energy
  • Goes from low to high concentration
  • Goes from high to low concentration (correct)
  • Moves large molecules

    • What is active transport?

  • Diffusion of water
  • Does not require ATP or energy
  • Movement of small molecules
  • Goes from low to high concentration (correct)

    • What is facilitated diffusion?

  • Requires ATP
  • Movement of small molecules
  • Movement of water
  • Movement of larger molecules through carrier proteins (correct)

    • What is diffusion?

    <p>Movement of small molecules like gases</p> Signup and view all the answers

    What is osmosis?

    <p>Diffusion of water</p> Signup and view all the answers

    Does diffusion require energy?

    <p>False</p> Signup and view all the answers

    Does osmosis require energy?

    <p>False</p> Signup and view all the answers

    Does facilitated diffusion require energy?

    <p>False</p> Signup and view all the answers

    Does active transport require energy?

    <p>True</p> Signup and view all the answers

    Does exocytosis require energy?

    <p>True</p> Signup and view all the answers

    Does endocytosis require energy?

    <p>True</p> Signup and view all the answers

    Which direction does diffusion go?

    <p>Towards lower concentration</p> Signup and view all the answers

    Which direction does osmosis go?

    <p>Towards lower concentration</p> Signup and view all the answers

    Which direction does active transport go?

    <p>Towards higher concentration</p> Signup and view all the answers

    Does diffusion require a protein channel?

    <p>No</p> Signup and view all the answers

    Does facilitated diffusion require a protein channel?

    <p>Yes</p> Signup and view all the answers

    What is an example of facilitated diffusion?

    <p>Salt, Starches, and Sugar</p> Signup and view all the answers

    What is an example of osmosis?

    <p>Movement of water through the cell membrane</p> Signup and view all the answers

    What is an example of diffusion?

    <p>Carbon Dioxide and Oxygen moving through the lungs</p> Signup and view all the answers

    Study Notes

    Transport Mechanisms

    • Passive Transport: Moves substances from high to low concentration without ATP or energy.
    • Active Transport: Moves substances from low to high concentration, requiring ATP or energy.

    Types of Passive Transport

    • Facilitated Diffusion: Larger molecules (like salts, starches, and sugars) cross through carrier proteins.
    • Diffusion: Small molecules such as gases (Oxygen and Carbon Dioxide) move directly through membranes.
    • Osmosis: Specific type of diffusion, referring exclusively to the movement of water across cell membranes.

    Types of Active Transport

    • Sodium-Potassium Pump: A carrier protein mechanism that moves sodium out and potassium into the cell against their concentration gradients.
    • Endocytosis: Engulfing of large particles into the cell; often described as "cell eating".
    • Exocytosis: Expelling of large particles from the cell; often termed as "cell puking".

    Energy Requirements

    • Passive transport methods (Diffusion, Osmosis, Facilitated Diffusion) do not require energy.
    • Active transport methods (Active Transport, Endocytosis, Exocytosis) require energy.

    Concentration Gradients

    • Diffusion, Osmosis, Facilitated Diffusion: All move substances toward lower concentrations.
    • Active Transport: Moves substances toward higher concentrations.
    • Endocytosis: Directly related to movement into the cell.
    • Exocytosis: Involves movement toward the outside of the cell.

    Protein Channel Dependency

    • Facilitated Diffusion and Active Transport: Both require a protein channel to assist in the transport of substances.
    • Diffusion, Osmosis, Endocytosis, and Exocytosis: Do not rely on protein channels for transport.

    Examples of Transport Mechanisms

    • Facilitated Diffusion Examples: Movement of salts, starches, and sugars.
    • Diffusion Examples: Carbon Dioxide and Oxygen exchange in lungs.
    • Osmosis Example: Water movement through cell membranes.
    • Active Transport Example: Use of protein pumps.
    • Endocytosis Example: White blood cells ingesting bacteria.
    • Exocytosis Example: Removal of waste and release of hormones.

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    Description

    Test your knowledge on passive and active transport processes in cells with this flashcard quiz. Understand key concepts such as facilitated diffusion and diffusion, and how they differ in terms of energy requirements and concentration gradients.

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