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- Dictionarymembrane/ˈmɛmbreɪn/
noun
- 1. a thin sheet of tissue or layer of cells acting as a boundary, lining, or partition in an organism: "the nucleus is a distinct region with a membrane around it"
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Oct 30, 2024 · 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.
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. Membranes can be generally classified into synthetic membranes and biological membranes. [1] .
Sep 29, 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.
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.
MEMBRANE definition: 1. a thin piece of skin that covers or connects parts of a person's or animal's body: 2. a very…. Learn more.
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.
The biological membrane, also known as cell membrane or biomembrane, is a selectively permeable membrane that defines the boundary of the cell and separates it from the external environment. [1] The existence of cell membranes wasn’t known until the invention of the microscope in the seventeenth century. [2]
Show details. 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.
a thin piece of skin that covers or connects parts of a person's or animal's body: The cornea is the transparent membrane that covers the front of the eye. engineering. a very thin piece of material that covers an opening. biology. the outer covering of a cell: a cell membrane. SMART Vocabulary: related words and phrases.
1. : a thin soft pliable sheet or layer especially of animal or plant origin. 2. : a piece of parchment forming part of a roll. membraned. ˈmem-ˌbrānd. adjective. Examples of membrane in a Sentence. Recent Examples on the Web. These examples are automatically compiled from online sources to illustrate current usage.
