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There are 2 glossary search results for:   receptor potential




Definition:
Refers to synaptic or receptor potentials that can vary in amplitude and direction. Graded potentials can be depolarizing or hyperpolarizing and do not have a threshold.

Related glossary terms/phrases:
Action potential

See also:
Neuronal Action Potential - Introduction
Neuronal Action Potential - Graded Potentials versus Action Potentials



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