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5 Written questions

5 Matching questions

  1. What is the difference between diffusion and bulk flow?
  2. What drives transpirational water loss?
  3. Diffusional resistance of transpirational pathway consists of what two components?
  4. What is emboli?
  5. What kind of pressure is between the xylem and cells?
  1. a the formation of gas bubbles
  2. b Diffusion, substances move down a concentration gradient, bulk flow moves down a pressure gradient
  3. c there is a negative hydrostatic pressure
  4. d this is driven by a gradient in water vapor concentration
  5. e boundary layer resistance and leaf stomatal resistance

5 Multiple choice questions

  1. the mutual attraction of water molecules to themselves
  2. transfer of water traveling between cell walls and any extra cellular spaces that have water in it on it's way to the root cortex driven by hydrostatic pressure
  3. pathway of water moving through a network of cells connected via the plasmodesmata going to the cortex driven by hydrostatic pressure
  4. cellulose and microfibril
  5. difference in water vapor concentration in the air spaces in the leaf and the external air

5 True/False questions

  1. What is solute potential and what does it do?it is the relative expression of the free energy associated with water, it is the difference between the potential as a given state and the potential of substance at a standard state

          

  2. What two things is the rate of water flow to a plant dependent upon?the size of the pressure gradient at the root tip and the soil near by and soil hydraulic conductivity

          

  3. Explain how water in soil depends on soil type and structurethis includes things such as the particle diameter and the surface area per gram of soil, this affects the adhesion properties of water

          

  4. What drives xylem water transport?the measurement of free energy of water per unit of volume. (J/m^3)

          

  5. What is the chemical potential of water?it is the relative expression of the free energy associated with water, it is the difference between the potential as a given state and the potential of substance at a standard state

          

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