Membrane Potentials D008564

Related MeSH Hierarchy (4)

Phenomena and Processes [G] » Physical Phenomena [G01] » Biophysical Phenomena » Membrane Potentials

Phenomena and Processes [G] » Cell Physiological Phenomena [G04] » Membrane Potentials

Phenomena and Processes [G] » Physiological Phenomena [G07] » Electrophysiological Phenomena » Membrane Potentials

Phenomena and Processes [G] » Musculoskeletal and Neural Physiological Phenomena [G11] » Nervous System Physiological Phenomena » Membrane Potentials

Description

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).   MeSH

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