Cell Membrane - Transport

Diffusion is the net movement of particles from and area of high concentration to an area of low concentration, down a concentration gradient.

Osmosis is the net movement of particles from an area of high water potential to an area of low water potential, down a water potential gradient. 

Factors that affect diffusion: concentration gradient, higher equals faster. The thickness of the exchange surface, thinner equals faster. The surface area, larger equals faster.

Key definitions:

Hypotonic solution: a solution with a higher water potential than the cell.

Isotonic solution: a solution with equal water potential to the cell.

Hypertonic solution: a solution with a lower water potential than…