- Cell membranes are made up of glycerophoslipids- molecules that are made of glycerol, a phosphate group, and two fatty acid chains

- Cell membranes function are to organize the cell, to protect it and to maintain homeostasis, be a barrier between cells and its environment

- In the eukaryotic cell there is an internal membrane protect the organelles and exchange the cell components

- The cell membrane is a barrier; the passage of large molecules, ions, and high charger molecules rely on specific transport proteins across the cell membrane rely, facilitative diffusion, embedded in the membrane

- Cell membranes are made up lipids and proteins