Water Potential

Osmolarity

________: the total concentration of all solutes in the solution.

Tonicity

________: the ability of an extracellular solution to make water move into or out of a cell by osmosis.

Pressure potential

________ is called turgor pressure in plants.

Water potential

________: the force responsible for movement of water in a system; a measure of the free energy of water which is less when it is has to surround solutes.

Pressure potential

________ is important in plant cells because they are surrounded by a cell wall which, is strong and rigid.

Tonicity

the ability of an extracellular solution to make water move into or out of a cell by osmosis

Osmolarity

the total concentration of all solutes in the solution

Water potential

the force responsible for movement of water in a system; a measure of the free energy of water which is less when it is has to surround solutes

Solute potential (also called osmotic potential) џs

determined by solute concentration

Solute potential

0 or negative

Pressure potential џp

results from exertion of pressure on membranes/walls as water moves in or out; can be positive or negative

Negative pressure

water being pulled

Positive pressure

seen when plant cell is in hypotonic solution

Water comes from

areas of higher water potential to areas of lower water potential (i.e. towards the more negative, concentrated region).