Cell membrane | Definition, Function, & Structure | Britannica
网页2024年8月23日 · 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.
Cell membrane - Wikipedia
网页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).
Cell Membrane - The Definitive Guide | Biology Dictionary
网页2020年10月19日 · 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. a 3D diagram of the cell membrane.
3.1 The Cell Membrane – Anatomy & Physiology - Open …
网页The cell membrane provides a barrier around the cell, separating its internal components from the extracellular environment. It is composed of a phospholipid bilayer, with hydrophobic internal lipid “tails” and hydrophilic external phosphate “heads.”
Cell Membranes | Learn Science at Scitable - Nature
网页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.
6.3: Structure of the Cell Membrane - Biology LibreTexts
网页2022年7月31日 · Identify components of the cell membrane, including phospholipids, cholesterol, proteins, and carbohydrates
Membrane | Definition, Structure, & Functions | Britannica
网页2024年8月26日 · membrane, in biology, the thin layer that forms the outer boundary of a living cell or of an internal cell compartment. The outer boundary is the plasma membrane, and the compartments enclosed by internal membranes are called organelles.
Cell Membranes - The Cell - NCBI Bookshelf - National Center for ...
网页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.
Cell membrane: Video, Anatomy, Definition & Function | Osmosis
网页The cell membrane is an important structural element of the building block of life - the cell. Its main role is to define what’s inside - the intracellular space - and what’s outside - the extracellular space.
3.4 The Cell Membrane - Concepts of Biology - OpenStax
网页A cell’s plasma membrane defines the boundary of the cell and determines the nature of its contact with the environment. Cells exclude some substances, take in others, and excrete still others, all in controlled quantities.
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