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  2. Lipid bilayer - Wikipedia

    en.wikipedia.org/wiki/Lipid_bilayer

    The three main structures phospholipids form in solution; the liposome (a closed bilayer), the micelle and the bilayer. [1] The lipid bilayer (or phospholipid bilayer) is a thin polar membrane made of two layers of lipid molecules. These membranes form a continuous barrier around all cells.

  3. Self-assembled monolayer - Wikipedia

    en.wikipedia.org/wiki/Self-assembled_monolayer

    Self-assembled monolayers (SAM) are assemblies of organic molecules that form spontaneously on surfaces by adsorption and organize themselves into more or less distinct domains (head group, chain/backbone, and tail/end group). [1] [2] In some cases, molecules

  4. Biological membrane - Wikipedia

    en.wikipedia.org/wiki/Biological_membrane

    Biological membranes, in the form of eukaryotic cell membranes, consist of a phospholipid bilayer with embedded, integral and peripheral proteins used in communication and transportation of chemicals and ions. The bulk of lipids in a cell membrane provides a fluid matrix for proteins to rotate and laterally diffuse for physiological functioning.

  5. Facilitated diffusion - Wikipedia

    en.wikipedia.org/wiki/Facilitated_diffusion

    Facilitated diffusion in cell membrane, showing ion channels and carrier proteins. Facilitated diffusion (also known as facilitated transport or passive-mediated transport) is the process of spontaneous passive transport (as opposed to active transport) of molecules or ions across a biological membrane via specific transmembrane integral proteins. [1]

  6. Cell (biology) - Wikipedia

    en.wikipedia.org/wiki/Cell_(biology)

    Detailed diagram of lipid bilayer of cell membrane. The cell membrane, or plasma membrane, is a selectively permeable [citation needed] biological membrane that surrounds the cytoplasm of a cell. In animals, the plasma membrane is the outer boundary of the cell, while in plants and prokaryotes it is usually covered by a cell wall.

  7. Monolayer - Wikipedia

    en.wikipedia.org/wiki/Monolayer

    A micelle is a monolayer, and the phospholipid lipid bilayer structure of biological membranes is technically two monolayers. Langmuir monolayers are commonly used to mimic cell membrane to study the effects of pharmaceuticals or toxins. [4]

  8. Osmosis - Wikipedia

    en.wikipedia.org/wiki/Osmosis

    The process of osmosis over a semipermeable membrane.The blue dots represent particles driving the osmotic gradient. Osmosis (/ ɒ z ˈ m oʊ s ɪ s /, US also / ɒ s-/) [1] is the spontaneous net movement or diffusion of solvent molecules through a selectively-permeable membrane from a region of high water potential (region of lower solute concentration) to a region of low water potential ...

  9. Membrane models - Wikipedia

    en.wikipedia.org/wiki/Membrane_models

    It eliminated the need to accommodate membrane proteins in thin surface layers, proposed that the variability in the protein/lipid ratios of different membranes simply means that different membranes vary in the amount of protein they contain, and showed how the exposure of lipid-head groups at the membrane surface is compatible with their ...