The Fluid Mosaic Model states that membranes are composed of a Phospholipid Bilayer with various protein molecules floating around within it. The 'Fluid' part represents how some parts of the membrane can move around freely, if they are not attached to other parts of the cell.
Answer:
Myelin sheath
Explanation:
Myelin sheath is a protective covering in axons that consist of lipids and proteins, produced by oligodendrocytes. This covering protects the nerve cells from receiving any other electrical impulses not directed to them. It also effeciently speeds the transmission of nerve messages amongst nerve cells in the nervous system.
