A delicate structure which encloses the cell, separating the contents of the cell from the surrounding environment.

the phospholipid and protein layer that encases living cells.

A thin layer that surrounds a cell.

the part of the cell which separates the external environment from the cytoplasm; cell membranes have hydrophilic external surfaces and hydrophobic interiors.

The lipid bilayer plasma membrane that forms the cell boundary.

('sel - 'mem-"bran) — The outer boundary of the cell that controls the movement of materials in and out of the cell. Found in both plant and animal cells.

sell mem-brain Controls what goes into and out of a living cell

The lipid bilayer that encloses a cell.

A thin semi-permeable membrane that surrounds the cell's cytoplasm.

a thin membrane around the cytoplasm of a cell; controls passage of substances in and out of the cell

a soft boundary, like the skin on gelatin, and is found in animal cells

a twin layer of lipid -- a biochemical term for fat and oil

The thin layer made of proteins, fats and carbohydrates, which form the capsule of a cell, and is its outside "skin".

outer part of a living cell

Proteins embedded in a lipid bilayer, which forms the boundary of cells. 66

The bounding membrane of cells which controls the entry of molecules and the interaction of cells with their environment, plasma membrane.

The semi permeable barrier, or membrane, that encloses the cytoplasm of a cell.

The outer boundary of cells, the structure of which is visible only under the electron microscope.

A plasma membrane that defines a cell as a distinct entity. It is made up of double phosolipid embedded with proteins.

A thin bilayer of lipids that envelops every cell. The membrane is selectively permeable which allows some molecules to cross but not others. The cell membrane thus controls what enters and exits the cell.

the envelope around a cell which encloses the cytoplasm and is responsible for the exchange of materials with the surrounding environment.

Cell membranes are semi-permeable layers that surround the cell and hold the cell together.

An organelle that is a bilayer of phospholipid molecules with inserted proteins. It acts as a gateway and a barrier for the cell. The cell membrane keeps certain molecules out and lets certain molecules in.

The outer membrane of the cell; the plasma membrane.

The outer membrane of a cell, which separates it from the environment. Also called a plasma membrane or plasmalemma.

Structure forming outer cell covering and found inside cells, a lipid bilayer with proteins on or within the bilayer, refer to the diagram in notes for cell structure and function.

(n) The thin outer layer of a cell.

Surrounds and insulates a cell.

A term often used to refer to the outer, plasma membrane, of a cell. However, most cells contain a great many membranes in addition to the plasma membrane.

Outside boundary of a human cell.

the thin layer of protein and fat that surrounds the cell. The cell membrane is semipermeable, allowing some substances to pass into the cell and blocking others.

The surrounding border of the cell, formed of proteins and lipids, that encloses the cell and controls the movement of substances inside and outside of the cell.

also called the plasma membrane. The external limiting membrane of a cell. It is composed of lipids (fat molecules) that have a hydrophobic (insoluble in water) end and a hydrophilic (water-soluble) end. Cell membranes are made of lipid bilayers in which the lipids line up in two layers with the hydrophobic ends facing each other and the hydrophilic ends facing the outside and the inside of the cell.

An extremely thin layer surrounding each cell in the body that only allows certain molecules to pass through it. It consists of three layers, each one molecule in thickness. The inner and outer layers are made of protein, while the middle layer is made up of a double layer of fat molecules.

The outer boundary of a cell. Also called the plasma membrane.

a semi permeable outside layer surrounding the protoplasm of a cell

The outer boundary of the cell. The cell membrane helps control what substances enter or exit the cell.

thin, elastic structure that completely surrounds a cell.

the thin layer of protein and fat that surrounds the cell, but is inside the cell wall. The cell membrane is semipermeable, allowing some cell wall - a thick, rigid membrane that surrounds a plant cell. This layer of cellulose fiber gives the cell most of its support and structure. The cell wall also bonds with other cell walls to form the structure of the plant.

Plasmalemma; outermost portion of of a cell

a thin layer surrounding the cell that regulates materials entering and leaving the cell

The lipid- and protein-containing, selectively permeable membrane that surrounds the cytoplasm in prokaryotic and eukaryotic cells. In most types of microbial cells it is bordered externally by the CELL WALL. (Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed)

The cell membrane, also called the plasma membrane or plasmalemma, is a semipermeable lipid bilayer common to all living cells. It contains a variety of biological molecules, primarily proteins and lipids, which are involved in a vast array of cellular processes. It also serves as the attachment point for both the intracellular cytoskeleton and, if present, the cell wall.