Passive Transport - updated

Passive transport does not require energy down concentration gradients Often, substances have to be moved from a low to a high concentration

Solution: The membrane transport which does not use energy to move across the semipermeable membrane is called passive transport The major passive transports

passive transport Perhaps the simplest case of passive transport occurs where membrane proteins form channels through the lipid membrane These either involve only one

active transport In facilitated transport , also called facilitated diffusion, materials diffuse across the plasma membrane with the help of membrane proteins