5 Written questions
5 Matching questions
- What is the difference between diffusion and bulk flow?
- What drives transpirational water loss?
- Diffusional resistance of transpirational pathway consists of what two components?
- What is emboli?
- What kind of pressure is between the xylem and cells?
- a the formation of gas bubbles
- b Diffusion, substances move down a concentration gradient, bulk flow moves down a pressure gradient
- c there is a negative hydrostatic pressure
- d this is driven by a gradient in water vapor concentration
- e boundary layer resistance and leaf stomatal resistance
5 Multiple choice questions
- the mutual attraction of water molecules to themselves
- 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
- pathway of water moving through a network of cells connected via the plasmodesmata going to the cortex driven by hydrostatic pressure
- cellulose and microfibril
- difference in water vapor concentration in the air spaces in the leaf and the external air
5 True/False questions
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
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
Explain how water in soil depends on soil type and structure → this includes things such as the particle diameter and the surface area per gram of soil, this affects the adhesion properties of water
What drives xylem water transport? → the measurement of free energy of water per unit of volume. (J/m^3)
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