Table of Contents  Water and Solute Movement | The Cell Membrane
| Cells and Diffusion | Active and Passive Transport | Carrier-
assisted Transport  Types of transport molecules | Vesicle-
mediated transport | Learning Objectives | Terms | Links |
References  Water and Solute Movement | Back to Top   Water
potential is the tendency of water to move from an area of
higher concentration to one of lower concentration. Energy
exists in two forms: potential and kinetic. Water molecules move
according to differences in potential energy between where they
are and where they are going. Gravity and pressure are two
enabling forces for this movement. These forces also operate in
the hydrologic (water) cycle. Remember in the hydrologic cycle
that water runs downhill (likewise it falls from the sky, to get
into the sky it must be acted on by the sun and evaporated, thus
needing energy input to power the cycle).   Diffusion is the net
movement of a substance (liquid or gas) from an area of higher
concentration to one of low