60 likes | 251 Views
Diffusion, Osmosis, and the Cell Membrane. Diffusion. Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration. Concentration is the amount of substance in a given space.
E N D
Diffusion • Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration. • Concentration is the amount of substance in a given space. • The smell of fresh baked bread “spreading” throughout the room is an example of diffusion. The diffusion of ink in water.
Osmosis • Osmosis is the diffusion of water through a selectively permeable membrane. • Osmosis occurs when water particles move from a higher concentration to a lower concentration.
Osmosis Example 1: Equal movement of water in and out of cells
Osmosis Example 2: More water moving into cells than is moving out
Osmosis Example 3: More water moving out of cells than is moving in