👉 Membranelle is a term that refers to a type of cell membrane in which lipids, proteins and other cellular components are distributed. Membrane proteins are proteins that can fold into specific shapes and allow them to interact with their environment. The structure of a membrane is composed of several layers, including the plasma membrane, which is the outermost layer and contains the majority of the cells' contents. Other membranes include the endoplasmic reticulum, Golgi apparatus, and the cy