Diffusion, active transport, osmosis, Flashcards
1
Q
Diffusion
A
Movement of particles from area of high concentration to an area of low concentration.
2
Q
Osmosis
A
Movement of water molecules from area of high concentration to an area of low concentration across a partially permeable membrane.
3
Q
Active transport
A
Movement of particles from area of low concentration to high concentration.
- Requires energy
4
Q
Amoeba can…
A
use diffusion in order to obtain all the nutrients it needs
5
Q
Why is diffusion appropriate for amoeba ?
A
- Single celled
- High surface area to volume ratio
- Diffusion occurs quickly
6
Q
Why is diffusion not appropriate for multi cellular organisms?
A
- Small surface area to volume ratio
- Diffusion is too slow
