Give an analogy of active and passive transport

The movement of molecules through membranes based only on concentrations is passive, requiring no energy expendature such as water moving through a membrane as in osmosis.

Active transport requires an energy expenditure and selectively moves substances against a concentration gradient. For instance sodium is transported into many cells by carriers in the cell membrane and requires ATP as an energy source.

1) clean up you lab area2) dispose of the chemicals as instructed by your teacher3) put everything back where it belongs unless your teacher tells you otherwise4) dispose of gloves5) wash hands with soap and water