Movement Of Substances Flashcards
0
Q
Define osmosis
A
The net movement of water from a dilute solution to a more concentrated solution across a PARTIALLY PERMEABLE MEMBRANE.
1
Q
Define diffusion
A
The net movement of particles from an area of high concentration to an area of low concentration, i.e. Down a concentration gradient
2
Q
Define active transport
A
The movement of particles against a concentration graduation
3
Q
Three ways the rate of diffusion is increased?
A
- steep concentration gradient
- high temperatures
- a large surface area to volume ratio
4
Q
What describes the state of a cell when it is surrounded in water?
A
It will become turgid.
5
Q
What does low water potential mean?
A
Low concentration of water in comparison to solute
