2.7

    Cards (13)

    • Membrane proteins are needed for facilitated diffusion
    • Facilitated Diffusion is required for large and small polar molecules
      • Large quantities of water pass through aquaporins
      • Charged ions, including Na+ and K+ require channel proteins
      • Ion - Charged particle
    • Active transport maintains and establishes concentration gradients.
    • Active transport moves molecules and ions against the concentration gradient from low to high
    • Active Transport requires metabolic energy (such as ATP)
    • Cotransport is a type of secondary active transport that uses the energy from an electrochemical gradient to transport two different ions across the membrane through a protein.
    • Symport is a type of transport where two different ions are transported in the same direction.
    • Membrane proteins are necessary for active transport.
    • Antiport is the movement of two different ions are transported in opposite directions
    • Membranes may become polarized by movement of ions.
    See similar decks