Osmosis Flashcards
1
Q
Osmosis definition
A
Diffusion of water
Net movement of water molecules from a region of high water potential to a region of low water potential through a partially permeable membrane
2
Q
What determines the net movement of water…
A
Differences in water potential between 2 solutions connected by a partially-permeable membrane
3
Q
Water potential?
A
Tendency of water molecules in a system to move
Denoted by symbol and measured in kPa
4
Q
Movement of water
A
Water molecules always move from a region go high water potential to an area of low water potential
5
Q
Water potential calculation
A
Solute potential + pressure potential
6
Q
Hypotonic solution
A
- Hypo = low solute conc
- Water moves into the cell from high to low water potential via osmosis
- Cell becomes cytolysed
7
Q
Isotonic solution
A
- Equal movement of water in and out of the cell
- Cell stays normal
8
Q
Hypertonic solution
A
- Hyper = high solute conc
- Water moves out of the cell from a high to a low water potential by osmosis
- Cell becomes crenated/plasmolyzed
