Selective permeability

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Selective permeability (also permselectivity ) is the property of biological membranes in particular to allow only certain molecules to pass through. Such a membrane is then called selectively permeable (Latin: selective = select; permeable = permeable).

The term is mainly used in biology in connection with the cell membrane .

In contrast to semipermeable membranes, biomembranes only allow very specific substances - these can be ions or molecules - to pass while others are blocked. Therefore, in this context, the term “selectively permeable” is ultimately more precise.

The ions or molecules pass through the biomembrane via membrane proteins .

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  1. ^ Peter Sitte , Elmar Weiler , Joachim W. Kadereit , Andreas Bresinsky , Christian Körner : Textbook of botany for universities . Founded by Eduard Strasburger . 35th edition. Spektrum Akademischer Verlag, Heidelberg 2002, ISBN 3-8274-1010-X , p. 43 .
  2. ↑ David L. Nelson , Michael Cox , Albert L. Lehninger : Lehninger Biochemie . 3. Edition. Springer textbook, Berlin 2001, ISBN 3-540-41813-X .

See also