When looking at the plasma membrane we need to remember that the plasma membrane involves blends of phospholipids but also of proteins. These proteins aren’t secured in any strict outline, proteins drift in the vicinity of the membrane; which is referred to as “the fluid mosaic model of the cell membrane”.These cell membranesconsist of a lipid bilayer. “The lipid molecules are designed in two rows, each row is a mirror image of the other row.”These portions create the frame work and the formation of the lipid molecules; a hydrophobic and a hydrophilic section. The hydrophobic segment evades water and water-like molecules and looks towards the inside forming the center of the lipid bilayer, while the hydrophilic section attracts water or water-like molecules and looks outward.
TRANSPORT PROTEINS are in charge of shipping and receiving. They transfer elements in and out of the cell. Some of them perform as pores that permit elements to diffuse within the membrane.
RECEPTOR PROTEINS Spread within the cell membrane. As the transmissions office of the cell, these membranes allow the cell to interrelate with additional cells. The part of the receptor protein on the external of the cell surface connects to a molecule. The specificity of receptor proteins permits the cell to react to the outside atmosphere in different ways
Reference and information gathered from:http://micro.magnet.fsu.edu/cells/plasmamembrane/plasmamembrane.html