Diffusion and Facilitated Diffusion

Diffusion:

Definition - the net movement of molecules oir ions down a concentration gradient (from high to low). No extra energy needed for diffusion as it is a passive process.

In net diffusion into a cell there is - 

• a region of higher concentration
• a region of lower concentration
• an area of equilibrium
• an intracellular space
• an extracellular space
• a lipid bilayer (/cell membranes)

Rate of diffusion can be increased by - 

• increase…