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Questions and Answers
True or false: Water is transported only through the symplast of the root cortex.
True or false: Water is transported only through the symplast of the root cortex.
False (B)
What drives the transport of solutes from apoplast to symplast in plants?
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?
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?
What are the two routes for fluid movement in plants?
What is responsible for pulling water up in plants?
What is responsible for pulling water up in plants?
What is responsible for pulling water up in plants?
What is responsible for pulling water up in plants?
What determines fluid movement in plants?
What determines fluid movement in plants?
What is the direction of fluid movement in plants determined by?
What is the direction of fluid movement in plants determined by?
What is the name of the hypothesis that explains the ascent of water in plants?
What is the name of the hypothesis that explains the ascent of water in plants?
True or false: The air-water interface plays no role in the ascent of water.
True or false: The air-water interface plays no role in the ascent of water.
What determines fluid movement in plants?
What determines fluid movement in plants?
What is the term used for the movement of sugar sap in plants?
What is the term used for the movement of sugar sap in plants?
What is the name of the hypothesis that explains the ascent of water in plants?
What is the name of the hypothesis that explains the ascent of water in plants?
What is the difference between the apoplastic and the symplastic routes?
What is the difference between the apoplastic and the symplastic routes?
What is the difference between the symplastic and the apoplastic routes?
What is the difference between the symplastic and the apoplastic routes?
What is the term used to refer to the movement of sugar sap in plants?
What is the term used to refer to the movement of sugar sap in plants?
True or false: The cohesion-tension hypothesis is a theory that explains how sugar sap moves through the phloem.
True or false: The cohesion-tension hypothesis is a theory that explains how sugar sap moves through the phloem.
What are the two routes for fluid movement in plants?
What are the two routes for fluid movement in plants?
What can lead to cavitation in plants?
What can lead to cavitation in plants?
What is water potential expressed as?
What is water potential expressed as?
What is the role of proton pumps in short distance transport of solutes in plants?
What is the role of proton pumps in short distance transport of solutes in plants?
What is the role of proton pumps in short distance transport of solutes?
What is the role of proton pumps in short distance transport of solutes?
What can lead to cavitation in plants?
What can lead to cavitation in plants?
True or false: Gravity has no effect on the resistance to bulk flow.
True or false: Gravity has no effect on the resistance to bulk flow.
What is the name of the system responsible for conducting the bulk flow of sugar sap in plants?
What is the name of the system responsible for conducting the bulk flow of sugar sap in plants?
How is water potential expressed mathematically?
How is water potential expressed mathematically?
True or false: Cavitation can occur when conduits snap under tension.
True or false: Cavitation can occur when conduits snap under tension.
What is the solute potential of water?
What is the solute potential of water?
How is water transported in the root cortex of a plant?
How is water transported in the root cortex of a plant?
How is water potential expressed mathematically?
How is water potential expressed mathematically?
How does solute potential affect water potential?
How does solute potential affect water potential?
What is the main method by which water is pulled up in plants?
What is the main method by which water is pulled up in plants?
What is the effect of solute potential on water potential in a solution?
What is the effect of solute potential on water potential in a solution?
How is water transported into the root cortex of a plant?
How is water transported into the root cortex of a plant?
What is the addition of solutes to water do to water potential?
What is the addition of solutes to water do to water potential?
True or false: The bulk flow of sugar sap is conducted through the xylem system.
True or false: The bulk flow of sugar sap is conducted through the xylem system.
What is the name of the system responsible for conducting the bulk flow of sugar sap in plants?
What is the name of the system responsible for conducting the bulk flow of sugar sap in plants?
What is the term used for the pushing of phloem sap in plants?
What is the term used for the pushing of phloem sap in plants?
What is the process involved in movement of water across short distances?
What is the process involved in movement of water across short distances?
What is involved in short distance transport of water?
What is involved in short distance transport of water?
True or false: Translocation refers to the movement of water from the soil to the plant.
True or false: Translocation refers to the movement of water from the soil to the plant.
What are the factors that affect short distance transport of water in plants?
What are the factors that affect short distance transport of water in plants?
What are some factors that contribute to resistance to bulk flow in plants?
What are some factors that contribute to resistance to bulk flow in plants?
What affects long distance transport of water?
What affects long distance transport of water?
True or false: Phloem sap is pushed by the application of positive pressure.
True or false: Phloem sap is pushed by the application of positive pressure.
What factors contribute to resistance to bulk flow in plants?
What factors contribute to resistance to bulk flow in plants?
What happens when a cell is placed in a sucrose-rich solution with lower water potential?
What happens when a cell is placed in a sucrose-rich solution with lower water potential?
What drives the long distance transport of water in plants?
What drives the long distance transport of water in plants?
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Study Notes
- Two routes for fluid movement in plants: apoplastic and symplastic.
- Fluid movement direction determined by water potential, from high to low.
- Water and sugar sap moves through apoplast and symplast compartments.
- Proton pumps drive transport of solutes from apoplast to symplast.
- Water potential expressed as Ψ, equal to solute potential plus pressure potential.
- Solute potential of water is negative, addition of solutes lowers water potential.
- Pressure potential can be positive or negative.
- Movement of water across short distances involves osmosis.
- Placing a cell in a sucrose-rich solution with lower water potential causes water to leave the cell.
- Placing a cell in pure water causes water to enter the cell, increasing pressure potential until equilibrium is reached.
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