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- DictionaryMem·brane/ˈmemˌbrān/
noun
- 1. a thin sheet of tissue or layer of cells acting as a boundary, lining, or partition in an organism: "the nucleus is a distinct region with a membrane around it"
A membrane is a thin soft pliable sheet or layer especially of animal or plant origin. Learn more about the word history, examples, phrases, and medical and kids definitions of membrane.
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What is the function of membrane proteins?
What is a cell membrane?
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What is a biological membrane?
Learn about the biological membrane that forms the outer boundary of a living cell or of an internal cell compartment. Find out how membranes are composed of lipids and proteins, and how they perform various functions such as transport, separation, and energy production.
- The Editors of Encyclopaedia Britannica
Membrane. Schematic of size-based membrane exclusion. A membrane is a selective barrier; it allows some things to pass through but stops others. Such things may be molecules, ions, or other small particles. Membranes can be generally classified into synthetic membranes and biological membranes. [1]
Membrane definition: a thin, pliable sheet or layer of animal or vegetable tissue, serving to line an organ, connect parts, etc.. See examples of MEMBRANE used in a sentence.
Jul 2, 2024 · A cell membrane is a thin layer of lipids and proteins that surrounds every living cell and regulates its interactions with the environment. Learn about the composition, functions, and types of cell membranes, as well as related topics such as ion channels and receptors.
- The Editors of Encyclopaedia Britannica
Learn the definition, structure, and function of the cell membrane, also known as the plasma membrane. Find out how phospholipids, proteins, and carbohydrates form a semipermeable barrier that controls the movement of substances into and out of the cell.
Cell membrane. The cell membrane (also known as the plasma membrane or cytoplasmic membrane, and historically referred to as the plasmalemma) is a biological membrane that separates and protects the interior of a cell from the outside environment (the extracellular space).
