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Oct 19, 2020 · The cell membrane, also known as the plasma membrane, is a double layer of lipids and proteins that surrounds a cell. It separates the cytoplasm (the contents of the cell) from the external environment. It is a feature of all cells, both prokaryotic and eukaryotic.
Nov 18, 2024 · Cell membrane, thin membrane that surrounds every living cell. The cell membrane functions as a barrier, keeping cell constituents in and unwanted substances out, and as a gate, allowing transport into the cell of essential nutrients and movement from the cell of waste products.
- The Editors of Encyclopaedia Britannica
Feb 2, 2023 · The cell membrane, also called the plasma membrane, is a thin layer that surrounds the cytoplasm of all prokaryotic and eukaryotic cells, including plant and animal cells.
Sep 16, 2022 · What is a cell membrane? Basically, a cell membrane (or plasma membrane) is an ultrathin, plastic, dynamic, electrically charged, and selectively-permeable membrane layer that separates the cytoplasm from the extracellular matrix and helps in maintaining the cell structure and function.
Aug 20, 2018 · The cell membrane (also called the cytoplasmic membrane or plasma membrane) is the guardian of a biological cell's contents and the gatekeeper of molecules entering and leaving. It is famously composed of a lipid bilayer. Movement across the membrane involves active and passive transport.
May 16, 2024 · The cell membrane, also known as the plasma membrane, is a thin, semi-permeable barrier that surrounds and encloses the contents of a cell. It separates the interior of the cell from the external environment, protecting the cell and regulating the movement of substances in and out of the cell.
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Mar 5, 2024 · The cell membrane is a protective barrier around the cell with control over what enters and exits. It is vital for maintaining cellular structure and function. The cell membrane, also known as the plasma membrane, is a crucial component of all living cells.
