Passive and Active Transport

Both Passive and Active Transport
1 Transport molecules through cell membrane
2 Make use of proteins embedded in cell membrane in order to move other molecules.

Passive Transport only
1 Doesn’t expend metabolic energy.
2 Flow of materials is down the concentration gradient.
3 Materials move to reach equilibrium.

Example: diffusion, osmosis, and facilitated diffusion.

Active Transport Only

1 Uses metabolic energy.
2 Material flow is against the concentration gradient.
3 Materials accumulate one side of a membrane

Example: Sodium-potassium pump