Cell Membrane Structure

Cell Membrane (aka. Plasma membrane) semi-permeable fluid portion is a double layer of phospholipids, called the phospholipid bilayer

Phospholipid bilayer Phospholipids contain a polar hydrophilic (likes water) head hydrophobic (hates water) tail and a non-polar

Proteins embedded in membrane serve different functions regulate movement of substance form small openings for molecules to diffuse through Transport Proteins Channel Proteins

Receptor Proteins Recognize and binds to substances outside the cell.

Cell-Surface Markers Made of carbohydrates used to identify cell types.

Jobs of the cell membrane: Separate the internal from external Regulate the exchange of substances Communicate with other cells Identification