osmosis Flashcards
1
Q
what is meant by ‘water potential’?
A
tendency of water to move out of solution
1
Q
what is osmosis?
A
net movement of water from high to low concentration gradient and low to high solute concentration across a partially permeable membrane
2
Q
what does it mean if water potential is high?
A
dilute
3
Q
what does it mean if water potential is low?
A
concentrated
4
Q
define ‘hypertonic solution’
A
low water potential of solution (concentrated)
5
Q
define ‘hypotonic solution’
A
high water potential of solution (dilute)
6
Q
define ‘isotonic solution’
A
solution and cell have equal water potential
7
Q
define ‘crenation’
A
- cell is in a hypertonic solution
- water leaves
- cell shrinks
8
Q
define ‘cytolosis’
A
- cell is in a hypotonic solution
- water enters
- cell bursts
9
Q
define ‘plasmolysis’
A
- cell is in hypertonic solution
- water leaves
- protoplast pulls away from cell wall
10
Q
define ‘turgid’
A
- cell is in hypotonic solution
- water enters
- protoplast expands
- cell becomes rigid
