2.4 Tonocity and Ormoregulatio

Question 1

Tonicity

Answer 1

The ability of a surrounding solution to cause a cell to gain or lose water depending on solute concentration

Question 2

Molarity

Answer 2

Concentration of solute in a solution (molar concentration)

Question 3

Molatiry Equation

Answer 3

M = n(moles of solute) / V (volumn of solution)

Question 4

Osmosis

Answer 4

Occurs when 2 solutions are separated by a barrier
Water flows from low solute concentration to high solute concentration

Question 5

Water potential

Answer 5

physical forces that affect the movement of water

Question 6

Hypertonic solution

Answer 6

The concentration of solutes is higher outside of the cell = water moves out

Question 7

Hypotonic Solution

Answer 7

The concentration of solutes higher in cell = water will move in

Question 8

Isotonic Solution

Answer 8

The concentration of solutes is equal on both sides = water flows in both directions equally

Question 9

Turgor Pressure

Answer 9

Develops as a result of water moving by osmosis into cells = affects the shape of the cell wall
Hypertonic = Turgid
Isotonic = Flaccid
Hypertonic = Plasmolysis

Question 10

Water Potential

Answer 10

measure of the difference in potential energy in pure water and a sample of water
- Pure = 0 water potential

Water moves from high to low water potential

Question 11

Pressure potential

Answer 11

Turger pressure in plants
Positive = increases water potential
Negative = decreases water protential

Question 12

Solute Potential

Answer 12

Negative in plants and 0 in pure water
Solute Content increases = solute potential decreases