5 Written questions
5 Matching questions
- If bulk flow is driven by pressure gradient how is it responsible for movement of water through soil?
- Water movement through soil is driven via what?
- What is surface tension? and why is this important in water?
- What is the driving force of water loss through the leaf?
- What two driving forces drive the direction and rate of water potential gradients?
- a bulk flow
- b the concentration of the solute and the pressure gradient
- c pressure is created by water via curvatures, water is going to want to move to areas of larger spaces with smaller curvatures
- d the absolute concentration difference (moles/cubic meters) this is effected by temperatures
- e it is the energy used to increase the surface area, the amount of surface area occupied by the interface of air and water. this is important because remember that water is more attracted to itself then to air molecules. (This is what can create contact angels) water generally wants to minimize the surface area at the air water interface
5 Multiple choice questions
- the measurement of free energy of water per unit of volume. (J/m^3)
- 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.
- it is pulled up from the roots via a negative hydrostatic pressure
- type of median, the begging state of the cell (flaccid or turgid), and the pressure
- pathway of water into one cell from another cell, cell to cell only pathway to cross the cell membrane driven by water potential gradient
5 True/False questions
What is the difference between diffusion and bulk flow? → there is a negative hydrostatic pressure
What are aquaporins and why are they important in plants? → surface tension, adhesion and cohesion. the capillarity of a liquid
Water is pulled from the xylem into what? → the measurement of free energy of water per unit of volume. (J/m^3)
Adhesion: → water molecule attraction to a solid such as a cell wall or a glass tube
Fisk's first law: → diffusion rate is directly proportional to the concentration gradient