Question

wat is d difference between passive transport n active transport..........

also the difference between diffusion n osmosis

Answer 1

Active Transport moves ions from low concentration to high, using metabolic energy in the form of ATP.  Both use ion channels to move ions across the cell membrane, in or out of the cell. Differences: Passive Transport (or Diffusion) moves ions from high concentration to low, using no metabolic energy.

When people discuss osmosis in biology, it always refers to the movement of water.  One big difference between osmosis and diffusion is that both solvent and solute particles are free to move in diffusion, but when we talk about osmosis, only the solvent molecules (water molecules) cross the membran