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  1. Membrane - Wikipedia

    Physical cleaning techniques for membrane include membrane relaxation and membrane backwashing. Back-washing or back-flushing consists of pumping the permeate in the reverse direction through the …

  2. Cell membrane | Definition, Function, & Structure | Britannica

    Nov 27, 2025 · What is the primary function of the cell membrane? The cell membrane acts as a barrier, keeping the cell’s constituents in and unwanted substances out, while also allowing transport of …

  3. Cell Membrane (Plasma Membrane) - Diagram, Structure, Function

    Sep 9, 2025 · The cell membrane (or plasma membrane) is a selectively permeable barrier that encloses the cell. It consists mainly of a phospholipid bilayer with embedded proteins, cholesterol, …

  4. Plasma Membrane (Cell Membrane)

    2 days ago · The plasma membrane, also called the cell membrane, is the membrane found in all cells that separates the interior of the cell from the outside environment. In bacterial and plant cells, a cell …

  5. Cell Membrane: Structure, Function, and Importance

    Aug 3, 2025 · Though often overshadowed by more glamorous components like the nucleus or mitochondria, the cell membrane—also known as the plasma membrane—is nothing short of …

  6. 3.1 The Cell Membrane – Anatomy & Physiology 2e

    This cell membrane provides a protective barrier around the cell and regulates which materials can pass in or out. Structure and Composition of the Cell Membrane The cell membrane is an extremely …

  7. 3.2 Structure and Composition of the Cell Membrane

    The cell membrane is a very flexible bilayer (meaning it has two layers) made up of molecules called phospholipids. A single phospholipid molecule has a phosphate group on one end, called the “head,” …

  8. 4: Membranes - Structure, Properties and Function

    4.1: Membrane Structure and Composition Since most cells live in an aqueous environment and the contents of the cell are also mostly aqueous, it stands to reason that a membrane that separates one …

  9. Cell Membranes | Learn Science at Scitable - Nature

    Scientists who model membrane structure and dynamics describe the membrane as a fluid mosaic in which transmembrane proteins can move laterally in the lipid bilayer.

  10. The Cell Membrane | Anatomy and Physiology I - Lumen Learning

    The cell membrane is an extremely pliable structure composed primarily of back-to-back phospholipids (a “bilayer”). Cholesterol is also present, which contributes to the fluidity of the membrane, and there …