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Glossary of Physiology Terms -
Impermeable

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Impermeable

Definition:
Not permeable. Not allowing the passage of substances. Impermeable refers to a property of a membrane or channel pore in preventing or restricting the passage of substances. For example, the lipid bilayer portion of biological membranes is highly impermeable to ions and large polar molecules.

See also permeable.

Related glossary terms/phrases:
Permeable
Permeability
Permeant
Impermeant

See also:
Lipid Bilayer Permeability




Posted: Wednesday, January 1, 2014
Last updated: Wednesday, March 12, 2025
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