Diffusion and osmosis

A selectively permeable membrane

A semi-permeable artificial membrane used in the lab

The use of energy to move molecules against a concentration gradient

Diffusion

Adaptations of the alveoli to improve gas exchange

Solvent

Solute

Solution

Osmosis

Hypertonic solution

Hypotonic solution

Isotonic solution

Animal cells in an isotonic solution

Animal cells in a hypotonic solution

Animal cells in a hypertonic solution

Examples of osmosis

Plant cells in an isotonic solution

Plant cells in a hypotonic solution

Turgor / turgor pressure

Plant cells in a hypertonic solution

The reversal of plasmolysis

Cell wall of bacteria

Cell walls of fungi

Food preservation by osmosis