osmosis

Osmosis

the net movement of water molecules from a region of higher water potential to a region of lower water potential through a partially permeable membrane

Water Potential

the tendency of water moelcules to move from one place to another

Osmotic Concentration

a measure of the concentration of the solutes in a solution that have an osmotic effect

Hypotonic

the osmotic concentration of the solutes in the solution lower than that in the cytoplasm of the cells

Isotonic

the osmotic concentration of the solutes in the solution is the same as that in the cells

Hypertonic

the osmotic concentration of the solutes in the solution is higher than the cytoplasm of cells

Osmosis in plant cells in hypotonic solution

water enters by osmosis but cell wall prevents it from bursting. cytoplasm swells and generates hydrostatic pressure. the plants become rigid in a state known as turgor

Osmosis in plant cells in hypertonic solution

in slightly hypertonic solutions water moves out of the cell by osmosis and turgor is lost. cell membrane begins to pull away from the cell as the protoplasm shrinks. this is called incipient plasmolysis.
in hypertonic solutions so much water will leave the cell that the vacuole will be reduced and the protoplasm will shrink away from the cell walls completely - plasmolysis

Osmosis in animal cells in hypotonic solution

water moves in and cells swell and burst

Osmosis in plant cells in hypertonic solution

water moves out and cells shrivel