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Membrane permeability, illustration

Membrane permeability, illustration

C023/8770

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Credit

SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY

Caption

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.

Release details

Model release not required. Property release not required.

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