5 Written questions
5 Matching questions
- Water is pulled through the xylem via what kind of pressure?
- What two reasons cause hydrostatic pressure become negative with a reduction of water in the soil?
- Bulk mass flow is sensitive to changes in what? But as long as there is little change in __ the driving force behind it is mostly affected by what?
- What drives xylem water transport?
- Specialized arrangements of what in guard cells plays a role in the opening and closing of the stomates?
- a adhesion and surface tension of water (more negative with increase curvature)
- b cellulose and microfibril
- c this is driven by pressure gradients
- d it is pulled up from the roots via a negative hydrostatic pressure
- e changes in radius, viscosity, concentration gradient
5 Multiple choice questions
- the loss of water. ~97% absorbed by plant, transported and evaporated through the leaf.
- Diffusion, substances move down a concentration gradient, bulk flow moves down a pressure gradient
- concerted movement of groups of molecules on mass. Responsible for long distance transport in the xylem and for much of the water though the soil and cell walls of plants.
- the ease at which the water moves through the soil (remember spaces between soil particles)
- the concentration of the solute and the pressure gradient
5 True/False questions
What can reduce tensile strength in a water column? → gas bubbles
Sum up the importance of water potential: → the measurement of free energy of water per unit of volume. (J/m^3)
Apoplast: → pathway of water moving through a network of cells connected via the plasmodesmata going to the cortex driven by hydrostatic pressure
What are nucleating sites and how are the reduced? → gas bubbles
Water movement through soil is driven via what? → into the cell walls of the mesophyll where water vapor diffuses through leaf air spaces through the stomatal pore and across the boundary layer