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Hace 3 días · 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 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).
The plasma membrane not only defines the borders of the cell, but also allows the cell to interact with its environment in a controlled way. Cells must be able to exclude, take in, and excrete various substances, all in specific amounts.
La membrana celular es semipermeable (o selectivamente permeable). Está formada de una bicapa de fosfolípidos, junto con varios otros lípidos, proteínas y carbohidratos. Imagen modificada de OpenStax, Biología. Cada fosfolípido es anfipático, con dos colas hidrofóbicas y una cabeza hidrofílica.
Cell Membranes. The structure and function of cells are critically dependent on membranes, which not only separate the interior of the cell from its environment but also define the internal compartments of eukaryotic cells, including the nucleus and cytoplasmic organelles.
Hace 3 días · Definición. La membrana de la célula, también llamada membrana citoplasmática, se encuentra en las células y separa su interior del medio exterior que las rodea. La membrana celular consiste en una bicapa (doble capa) lipídica que es semipermeable.
Cell membranes protect and organize cells. All cells have an outer plasma membrane that regulates not only what enters the cell, but also how much of any given substance comes in.
