Cell membrane - Wikipedia
The cell membrane (also known as the plasma membrane or cytoplasmic membrane, and historically referred to as the plasmalemma) is a semipermeable biological membrane that …
Membrane | Definition, Structure, & Functions | Britannica
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 …
Cell Membrane (Plasma Membrane) - Diagram, Structure, Function
Sep 9, 2025 · The cell membrane (or plasma membrane) is a selectively permeable barrier that encloses the cell. It consists mainly of a phospholipid bilayer with embedded proteins, …
Cell Membrane: Structure, Function, and Importance
Aug 3, 2025 · Though often overshadowed by more glamorous components like the nucleus or mitochondria, the cell membrane—also known as the plasma membrane—is nothing short of …
Plasma Membrane (Cell Membrane) - National Human Genome …
3 days ago · The plasma membrane, also called the cell membrane, is the membrane found in all cells that separates the interior of the cell from the outside environment. In bacterial and plant …
2.2: Structure and Function of Plasma Membranes
Analogously, a plasma membrane’s functions involve movement within the cell and across boundaries in the process of intracellular and intercellular activities. 2.2.2: Components and …
3.1 The Cell Membrane – Anatomy & Physiology 2e
This cell membrane provides a protective barrier around the cell and regulates which materials can pass in or out. Structure and Composition of the Cell Membrane The cell membrane is an …
Structure of the plasma membrane (article) | Khan Academy
This model has evolved over time, but it still provides a good basic description of the structure and behavior of membranes in many cells. According to the fluid mosaic model, the plasma …
The Cell Membrane | Biology I - Lumen Learning
Both phospholipid molecules and embedded proteins are able to diffuse rapidly and laterally in the membrane. The fluidity of the plasma membrane is necessary for the activities of certain …
Cell Membrane: Definition, Structure, & Functions with Diagram
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.