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Thesaurus Search Results

membrane potential
Subject Category
S Biological Sciences
Definition
The voltage differences across a membrane. For cellular membranes they are computed by subtracting the voltage measured outside the membrane from the voltage measured inside the membrane. They result from differences of inside versus outside concentration of potassium, sodium, chloride, and other ions across cells' or organelles membranes. For excitable cells, the resting membrane potentials range between -30 and -100 millivolts. Physical, chemical, or electrical stimuli can make a membrane potential more negative (hyperpolarization), or less negative (depolarization).
Definition Source
Medical Subject Headings 2012
RDF/XML Format:
http://lod.nal.usda.gov/nalt/3910.rdf
Persistent URI:
http://lod.nal.usda.gov/nalt/3910
Used For
resting membrane potential
resting potential
transmembrane potential
Broader Term
electrophysiology
physiological transport
Narrower Term
action potentials
Related Term
bioelectricity
liquid junction potential
Spanish
potencial de la membrana
Term Number
3910