plant transport part 2
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Questions and Answers

True or false: Water is transported only through the symplast of the root cortex.

False

What drives the transport of solutes from apoplast to symplast in plants?

  • Proton pumps (correct)
  • Stomata
  • Chlorophyll
  • Mitochondria

    • What are the two routes for fluid movement in plants?

  • The mesophyll and epidermal routes
  • The transpiration and respiration routes
  • The phloem and xylem routes
  • The symplastic and the apoplastic routes (correct)

    • What are the two routes for fluid movement in plants?

    <p>The apoplastic and the symplastic routes</p> Signup and view all the answers

    What is responsible for pulling water up in plants?

    <p>The air-water interface</p> Signup and view all the answers

    What is responsible for pulling water up in plants?

    <p>The air-water interface</p> Signup and view all the answers

    What determines fluid movement in plants?

    <p>Water potential</p> Signup and view all the answers

    What is the direction of fluid movement in plants determined by?

    <p>Water potential, from low to high</p> Signup and view all the answers

    What is the name of the hypothesis that explains the ascent of water in plants?

    <p>The cohesion-tension hypothesis</p> Signup and view all the answers

    True or false: The air-water interface plays no role in the ascent of water.

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

    What determines fluid movement in plants?

    <p>Water potential</p> Signup and view all the answers

    What is the term used for the movement of sugar sap in plants?

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

    What is the name of the hypothesis that explains the ascent of water in plants?

    <p>The cohesion-tension hypothesis</p> Signup and view all the answers

    What is the difference between the apoplastic and the symplastic routes?

    <p>The apoplastic route is external to the plasma membrane, while the symplast includes the cytosol and plasmodesmata</p> Signup and view all the answers

    What is the difference between the symplastic and the apoplastic routes?

    <p>The symplastic route is internal to the plasma membrane, while the apoplastic route is external to the plasma membrane</p> Signup and view all the answers

    What is the term used to refer to the movement of sugar sap in plants?

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

    True or false: The cohesion-tension hypothesis is a theory that explains how sugar sap moves through the phloem.

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

    What are the two routes for fluid movement in plants?

    <p>Apoplastic and symplastic</p> Signup and view all the answers

    What can lead to cavitation in plants?

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

    What is water potential expressed as?

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

    What is the role of proton pumps in short distance transport of solutes in plants?

    <p>To transport solutes</p> Signup and view all the answers

    What is the role of proton pumps in short distance transport of solutes?

    <p>They generate a proton gradient that drives solute uptake</p> Signup and view all the answers

    What can lead to cavitation in plants?

    <p>Snapping under tension</p> Signup and view all the answers

    True or false: Gravity has no effect on the resistance to bulk flow.

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

    What is the name of the system responsible for conducting the bulk flow of sugar sap in plants?

    <p>The phloem system</p> Signup and view all the answers

    How is water potential expressed mathematically?

    <p>Ψ = Ψs + Ψp</p> Signup and view all the answers

    True or false: Cavitation can occur when conduits snap under tension.

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

    What is the solute potential of water?

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

    How is water transported in the root cortex of a plant?

    <p>Into the symplast and apoplast</p> Signup and view all the answers

    How is water potential expressed mathematically?

    <p>Ψ = Ψs + Ψp</p> Signup and view all the answers

    How does solute potential affect water potential?

    <p>It lowers the water potential of the solution.</p> Signup and view all the answers

    What is the main method by which water is pulled up in plants?

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

    What is the effect of solute potential on water potential in a solution?

    <p>It lowers the water potential</p> Signup and view all the answers

    How is water transported into the root cortex of a plant?

    <p>Through the symplast and apoplast</p> Signup and view all the answers

    What is the addition of solutes to water do to water potential?

    <p>Decreases it</p> Signup and view all the answers

    True or false: The bulk flow of sugar sap is conducted through the xylem system.

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

    What is the name of the system responsible for conducting the bulk flow of sugar sap in plants?

    <p>The phloem system</p> Signup and view all the answers

    What is the term used for the pushing of phloem sap in plants?

    <p>Positive pressure</p> Signup and view all the answers

    What is the process involved in movement of water across short distances?

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

    What is involved in short distance transport of water?

    <p>Osmosis, affected by solute and pressure potential</p> Signup and view all the answers

    True or false: Translocation refers to the movement of water from the soil to the plant.

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

    What are the factors that affect short distance transport of water in plants?

    <p>Solute and pressure potential</p> Signup and view all the answers

    What are some factors that contribute to resistance to bulk flow in plants?

    <p>Viscosity of the sap, narrowness of the conduits, and gravity</p> Signup and view all the answers

    What affects long distance transport of water?

    <p>Pressure potential gradients</p> Signup and view all the answers

    True or false: Phloem sap is pushed by the application of positive pressure.

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

    What factors contribute to resistance to bulk flow in plants?

    <p>Narrowness of the conduits and tension</p> Signup and view all the answers

    What happens when a cell is placed in a sucrose-rich solution with lower water potential?

    <p>Water leaves the cell</p> Signup and view all the answers

    What drives the long distance transport of water in plants?

    <p>Pressure potential gradients</p> Signup and view all the answers

    Study Notes

    1. Two routes for fluid movement in plants: apoplastic and symplastic.
    2. Fluid movement direction determined by water potential, from high to low.
    3. Water and sugar sap moves through apoplast and symplast compartments.
    4. Proton pumps drive transport of solutes from apoplast to symplast.
    5. Water potential expressed as Ψ, equal to solute potential plus pressure potential.
    6. Solute potential of water is negative, addition of solutes lowers water potential.
    7. Pressure potential can be positive or negative.
    8. Movement of water across short distances involves osmosis.
    9. Placing a cell in a sucrose-rich solution with lower water potential causes water to leave the cell.
    10. Placing a cell in pure water causes water to enter the cell, increasing pressure potential until equilibrium is reached.

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    Description

    Test your knowledge of plant fluid movement with this quiz! Learn about the two routes for fluid movement, apoplastic and symplastic, and how water potential affects the direction of fluid movement. Explore how water and sugar sap moves through apoplast and symplast compartments, and the role of proton pumps in transporting solutes. Understand the concept of water potential expressed as Ψ, and the factors that contribute to it, including solute potential and pressure potential. Challenge yourself with questions on osmos

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