Understand how substances move across cell membranes through various transport mechanisms.
14 min · watch
See animations of diffusion, osmosis, and active transport.
11 min · read
Movement from high to low concentration.
Diffusion of water across a selectively permeable membrane.
Uses ATP to move substances against concentration gradient.
18 min · practice
Adjust solute concentrations and observe water movement!
5 min · quiz
Which process requires energy?