The cell membrane around a cell forms a barrier that protects and regulates the cell. Certain chemicals can pass through the plasma membrane because they have similar chemical properties as the membrane. Which best describes those that can pass through?
The lipid bilayer (or phospholipid bilayer) is a thin polar membrane made of two layers of lipid molecules.These membranes are flat sheets that form a continuous barrier around all cells. The cell membranes of almost all organisms and many viruses are made of a lipid bilayer as are the nuclear membrane surrounding the cell nucleus and membranes of the membrane -bound organelles in the cell .
A biological membrane biomembrane or cell membrane is a selectively permeable membrane that separates cell from the external environment or creates intracellular compartments.Biological membranes in the form of eukaryotic cell membranes consist of a phospholipid bilayer with embedded integral and peripheral proteins used in communication and transportation of chemicals and ions.
Biological membrane - Wikipedia
The cell (from Latin cella meaning "small room") is the basic structural functional and biological unit of all known organisms.Cells are the smallest units of life and hence are often referred to as the "building blocks of life". The study of cells is called cell biology cellular biology or cytology.
The blood–brain barrier (BBB) is a highly selective semipermeable border of endothelial cells that prevents solutes in the circulating blood from non-selectively crossing into the extracellular fluid of the central nervous system where neurons reside. The blood–brain barrier is formed by endothelial cells of the capillar...
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