Membrane Permeability
by Science Photo Library
Title
Membrane Permeability
Artist
Science Photo Library
Medium
Photograph - Photograph
Description
Membrane permeability. Illustration of a phospholipid bilayer (cell membrane), which has varying permeability to different molecules and ions. Permeability is high for small, uncharged molecules such as carbon dioxide (CO2), nitrogen (N2), oxygen (O2) and ethanol. Permeability is moderate for water and urea. Permeability is low for polar organic molecules like glucose. Permeability is very low for ions and large macromolecules like sodium, potassium, magnesium, calcium, chloride, hydrogen carbonate, and dihydrogen phosphate ions, and amino acids, proteins, polysaccharides and nucleic acids (DNA and RNA). For this artwork with labels, see image C023/8768.
Uploaded
July 1st, 2016
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