Biology › Membranes and transport across cells

Membranes and transport across cells

Unit B04 · 3 lessons published so far.

• The fluid mosaic model: what a membrane is made of
  The fluid mosaic model, why a phospholipid bilayer assembles itself, intrinsic and extrinsic proteins, channel and carrier proteins, cholesterol at…
• Diffusion and osmosis: movement that costs nothing
  Simple and facilitated diffusion, the factors in Fick's law and the relationship between them, osmosis defined by water potential in kilopascals, the…
• Active transport, co-transport and moving things in bulk
  Active transport against a concentration gradient using carrier proteins and ATP, the sodium-potassium pump and its three-to-two stoichiometry…

Practical work that lands here

• Investigating membrane permeability
• Water relations of plant tissue: osmosis and transpiration