the Plant Cell
Goals and Objectives
Be able to describe what hydrogen bonding
is and how it helps to explain the unique physical and chemical properties
Be able to explain how osmosis is a special
case of diffusion.
Be able to distinguish between osmotic pressure
and osmotic potential.
Be able to describe the concept of water potential
and how it is related to the chemical potential of water.
Be able to explain how the concept of water
potential is used to predict the movement of water in a plant.
Be able to describe the importance of turgor
pressure in a plant. Be able to relate this to what occurs in animals.
Describe the structure of a water molecule.
Be sure to explain how partial charges on the atoms lead to eletronegative
and electropositive atoms, and the polar molecule.
What is a hydrogen bond? How much energy
is contained in a hydrogen bond?
What is a hydration shell? Why are hydration
shells important biologically?
Describe each of the following thermal properties
of water, and give an example of why the property is important biologically.
Also, relate how hydrogen-bonding is responsible for these unique water
Why is water the universal solvent?
What is a hydration shell and why is it important
in dissolving substances?
What does the dielectric constant of a molecule
describe? What can it tell us about the ability of molecules to cross
What is the difference between cohesion and
How does cohesion affect water's surface tension
and tensile strength?
Movement of substances from one place to another
is called translocation. How is water translocated in a plant?
Describe what occurs in the bulk flow of water.
Give an example.
Describe what occurs in diffusion.
How do molecules diffuse? Give an example.
(see textbook, equation #2.1) What does this equation describe?
What are the individual components of this equation?
Diffusion of water is a special case called
_______. When two chambers are separated from one another by a ________
Describe what the osmotic pressure is and
indicate the symbol used for osmotic pressure in mathematical equations.
How does the osmotic pressure of a solution
relate to the osmotic potential? What is the symbol used to indicate
osmotic potential in mathematical equations?
How does osmotic potential, chemical potential,
and pressure potential affect water movement in a plant?
Temperature and Physical State
Absorption and Dissipation of Heat
melting and Vaporizing Water