Diffusion 30/3/12

1)What is concentration gradient?
When there is a different concentration of molecules in a substance, there will be a concentration gradient. 


2)What is Diffusion?
Diffusion is the movement of molecules from a higher concentrated area to a less concentrated area.


3)Movement of molecules with respect to concentration gradient.
It moves from a higher concentrated area to a less concentrated area.


4)What are the factors that affect Diffusion?
1)The size of the chemical driving force.
2) The surface area of the membrane.
3) The permeability of the membrane.