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Glossary of Physiology Terms
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There are 2 glossary search results for:   Astrocytes




Definition:
Glial cell found within the posterior pituitary gland. It resembles astrocytes and functions to provide support to unmyelinated axons whose terminals release oxytocin and vasopressin.



Definition:
The voltage difference across a cell plasma membrane in the resting or quiescent state. It is also simply referred to as the resting potential (Vrest). The value of the resting membrane potential varies from cell to cell. Depending on the cell type, it can range from −90 mV to −20 mV.

For example, Vrest is −90 mV in skeletal and cardiac muscle cells as well as in astrocytes. In a typical neuron, Vrest is approximately −70 mV. In many non-excitable cells, Vrest ranges from −60 to −50 mV. In photoreceptors, Vrest is about −20 mV.

See also:
Resting membrane potential









Posted: Sunday, March 31, 2013
Last updated: Friday, August 28, 2015