define cell membrane
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- The cell membrane (also known as the plasma membrane or cytoplasmic membrane) is a biological membrane that separates the interior of all cells from the outside environment. The cell membrane is selectively permeable to ions and organic molecules and controls the movement of substances in and out of cells. The basic function of the cell membrane is to protect the cell from its surroundings. It consists of the phospholipid bilayer with embedded proteins.
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Cell Membrane: Functions, Role & Structure The Cell Membrane is a Fluid Mosaic. A cell is the basic unit of life, and all organisms are made up of one or many cells. One of the things that all cells have in common is a cell membrane. It is a barrier that separates a cell from its surrounding environment. This outer boundary of the cell is also called the plasma membrane.
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Membrane 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. Biological membranes include cell membranes (outer coverings of cells or organelles that allow passage of certain constituents); nuclear membranes, which cover a cell nucleus; and tissue membranes, such as mucosae and serosae.
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Cell Structure Cell Membrane. 1  a thin, flexible barrier surrounding the cell. made up of a double-layered sheet called a lipid bilayer. regulates what enters and leaves the cell and also protects and supports the cell.
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- The Cell Membrane - A cell membrane allows some substances to enter or leave the cell, while stopping other substances. It is a selectively permeable membrane. A permeable membrane allows all materials through, while an impermeable membrane does not allow anything through At the border certain materials are not allowed into the country.
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- The cell membrane is a thin, semi-permeable barrier that surrounds and encloses the contents of a cell. It supports and helps maintain a cell's shape. Cell Membrane Function and Structure
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The Cell Membrane [Back to Microscopy and Cells] Cell membranes are a barrier to most substances, and this property allows materials to be concentrated inside cells, excluded from cells, or simply separated from the outside environment. This is compartmentalisation is essential for life, as it enables reactions to take place that would otherwise be impossible.
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Cell membrane Cell membrane. A cell membrane, plasma membrane or plasmalemma is a selectively permeable lipid bilayer coated by proteins which comprises the outer layer of a cell. The plasma membrane works between the machinery on the inside of the cell and the outside fluid that bathes the cells. The plasma membrane lets nutrients into the cell such as glucose, amino acids, and lipids.
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Cell membrane: The cell's city wall The cell membrane is a continuous sheet of two layers of fat like molecules with protein molecules 'floating' within it. The proteins in the cell membrane have various functions. Some are transport proteins which regulate entry and exit of material to and from the cell, others are receptors for hormones etc. For example, nutrients, such as glucose or amino-acids, need special carrier proteins to help them enter the cell.
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- What is another name for a cell membrane? A cell membrane is also known as a plasma membrane or  cytoplasmic membrane. The cell membrane separates the  interior of a cell from its outside environment. The main funct…ion  of a cell membrane is to protect the cell from its surroundings. Michael Whiting.
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The Cell Membrane [Back to Microscopy and Cells] The Structure of the Cell Membrane. The cell membrane (or plasma membrane) surrounds all living cells, and is the cell's most important organelle. It controls how substances can move in and out of the cell and is responsible for many other properties of the cell as well.
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membrane transport cell membrane. double layer of phospholipids that forms a boundary between a cell and the surrounding environment and controls the passage of materials into and out of a cell. phospholipid. molecule that forms a double layered cell membrane; consists of glycerol, a phosphate group, and two fatty acids.
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- Define membrane. membrane synonyms, membrane pronunciation, membrane translation, English dictionary definition of membrane. n. 1. Biology a. A thin, pliable layer of tissue covering surfaces or separating or connecting regions, structures, or organs of a living organism. b.
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Animal and Plant Cells cell membrane. A cell structure that controls which substances can enter or leave the cell. (found in all cells) In cells with cell walls, the cell membrane is located just inside the cell wall. In other cells, the cell membrane forms the outside boundary that separates the cell from its environment.   .
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cell membrane 1. 1  the semipermeable membrane enclosing the cytoplasm of a cell. 2  a very thin membrane, composed of lipids and protein, that surrounds the cytoplasm of a cell and controls the passage of substances into and out of the cell Also called plasmalemma, plasma membrane.
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- Cell Parts and Organelle Functions -. The cell membrane (or plasma Membrane) is a structure that forms the outer boundary of the cell and allows only certain materials to move into and out of the cell. Food, oxygen and water move into the cell through the membrane.
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cell membrane cell membrane. The thin membrane that forms the outer surface of the protoplasm of a cell and regulates the passage of materials in and out of the cell. It is made up of proteins and lipids and often contains molecular receptors. The membranes of organelles within the cell are made of the same basic material as the cell membrane.
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What is the difference between the plasma membrane and the cell membrane? The cell membrane (also known as the plasma membrane or cytoplasmic membrane) is a biological membrane that separates the interior of all cells from the outside environment. The cell membrane is selectively permeable to ions and organic molecules and controls the movement of substances in and out of cells.he cell membrane (also known as the plasma membrane or cytoplasmic membrane) is a biological membrane that separates the interior of all cells from the outside environment. The cell membrane is selectively permeable to ions and organic molecules and controls the movement of substances in and out of cells.
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Definition of 'cell membrane' Definition of 'cell membrane'. cell membrane in British. noun. a very thin membrane, composed of lipids and protein, that surrounds the cytoplasm of a cell and controls the passage of substances into and out of the cell. . Also called : plasmalemma, plasma membrane.
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What does the cell membrane do for a cell? The cell membrane controls what enters and leaves the cell, allowing the cell to absorb the oxygen and nutrients it needs to function and also protects the cell from most dangerous chemicals.
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Cell membrane The 'cell membrane' (also known as the plasma membrane or cytoplasmic membrane) is a biological membrane that separates the interior of all cells from the outside environment. The cell membrane is selectively permeable to ions and organic molecules and controls the movement of substances in and out of cells. The basic function of the cell membrane is to protect the cell from its surroundings. It consists of the phospholipid bilayer with embedded proteins.
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membrane Definition of membrane for English Language Learners. : a thin sheet or layer; especially : a thin sheet or layer of tissue that is part of a plant or an animal's body.
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Cell membrane Cell membrane. A cell membrane, plasma membrane or plasmalemma is a selectively permeable lipid bilayer coated by proteins which comprises the outer layer of a cell. The plasma membrane works between the machinery on the inside of the cell and the outside fluid that bathes the cells.
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What are the functions of the cell membrane? The cell membrane is selectively permeable to ions and organic molecules and controls the movement of substances in and out of cells. The basic function of the cell membrane is to protect the cell from its surroundings. It consists of the phospholipid bilayer with embedded proteins.
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- Definition of cell membrane. a thin membrane around the cytoplasm of a cell; controls passage of substances in and out of the cellSimilar Words: cell wall, cytomembrane, plasma membrane Part Meronyms: cell. Similar Words: cell wall, cytomembrane, plasma membrane Part Meronyms: cell.efinition of cell membrane. a thin membrane around the cytoplasm of a cell; controls passage of substances in and out of the cellSimilar Words: cell wall, cytomembrane, plasma membrane Part Meronyms: cell. Similar Words: cell wall, cytomembrane, plasma membrane Part Meronyms: cell.