Passive Transport

Diffusion, Facilitated Diffusion, Osmosis

Material moves from

high concentration to low concentration

Materials move until

equilibrium

No _____ is required

energy

Diffusion

Materials move through phospholipids

Molecules that move during diffusion

Small and nonpolar alcohols (ex. O_2, CO_2, CH₂)

Facilitated Diffusion

Material moves through a protein

Requirements for facilitated diffusion

Shape (carrier proteins only), large monosaccharides or amino acids, and polar or charged molecules

Osmosis

Movement of water

Osmosis happens through

channel proteins

Osmosis is also called

aquaporin