D2.3 Water Potential

Question 1

Solvent

Answer 1

The substance in which a solute dissolves

Question 2

Solute

Answer 2

The substance that is dissolved in the solvent

Question 3

Solvation

Answer 3

Process by which solvent molecules surround and interact with solute molecules

Question 4

Isotonic

Answer 4

A solution where the solute concentration is the same as that inside the cell, leading to no net movement of water

Question 5

Hypotonic

Answer 5

A solution where the solute concentration is lower than inside the cell, causing water to move into the cell

Question 6

Hypertonic

Answer 6

A solution where the solute concentration is higher than inside the cell, causing water to move out of the cell

Question 7

Hypotonic solution

Answer 7

Water moves into the cell

Question 8

Hypertonic solution

Answer 8

Water moves out of the cell

Question 9

Water potential

Answer 9

• potential energy of water per unit volume, driving the movement of water
• Solute potential + pressure potential
• measured in Kila Pascals

Question 10

Plasmolysis

Answer 10

Occurs when a plant cell is placed in a hypertonic solution (eflux of water), causing the cell to shrink and the plasma membrane to pull away from the cell wall

Question 11

Lysis

Answer 11

The bursting of animal cells when placed in a hypotonic solution (influx of water), causing it to swell and rupture

Question 12

Turgor pressure

Answer 12

Pressure exerted on a cell wall by fluid inside the cell

Question 13

Crenation

Answer 13

Occurs when a plant cell is placed in a hypertonic solution (eflux of water), causing it to shrink and become wrinkled