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.
Cell Membranes | Learn Science at Scitable - Nature
网页There are many different kinds of membranes in a cell. Learn how they subdivide sections of a cell and how proteins in these membranes are gatekeepers for what goes in and what comes out.
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.
3.1 The Cell Membrane – Anatomy & Physiology - Open …
网页Just as the outer layer of your skin separates your body from its environment, the cell membrane (also known as the plasma membrane) separates the inner contents of a cell from its exterior environment. This cell membrane provides a protective barrier around the cell and regulates which materials can pass in or out.
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.
3.1 The Cell Membrane - Anatomy and Physiology - OpenStax
网页As the outer layer of your skin separates your body from its environment, the cell membrane (also known as the plasma membrane) separates the inner contents of a cell from its exterior environment. This cell membrane provides a protective barrier around the cell and regulates which materials can pass in or out.
6.3: Structure of the Cell Membrane - Biology LibreTexts
网页2022年7月31日 · Describe the structure of cell membranes; Identify components of the cell membrane, including phospholipids, cholesterol, proteins, and carbohydrates
3.4 The Cell Membrane - Concepts of Biology - OpenStax
网页Understand the fluid mosaic model of membranes. Describe the functions of phospholipids, proteins, and carbohydrates in membranes. A cell’s plasma membrane defines the boundary of the cell and determines the nature of its contact with the environment.