The Membrane The membrane has a double lipid layer through which fat- soluble substances will move, by passive transport or diffusion. The molecules will only move through if they are small enough. There are globular protein regions, which are hydrophilic. These regions allow water and water soluble substances through, but only if they are small enough, for example starch grains are too big. These substances move through by passive transport or diffusion. Diffusion is the …showed first 75 words of 234 total…

…showed last 75 words of 234 total…active transport by insulin. Why is it called the Fluid Mosaic Model? Fluid- it is called a fluid because proteins are said to wander through the membrane (hence fluid) Mosaic- it is a mosaic because it is a collection (or mosaic) of structures Model- because no matter how real the diagram looks, it is not real. Therefore, it is a model. SO you put all three bits together and you get. FLUID MOSAIC MODEL! YAY!!!!!!