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Definition of the noun action potential
What does action potential mean as a name of something?
- the local voltage change across the cell wall as a nerve impulse is transmitted
Alternative definition of the noun action potential
- A short term change in the electrical potential that travels along a cell such as a nerve or muscle fiber.
- "Action Potential" is a musical album of Left Side Brain.
- released in (9 years ago)
- "Action Potential" is a composition.
Action potential: In physiology, an action potential is a short-lasting event in which the electrical membrane potential of a cell rapidly rises and falls, following a consistent trajectory. Action potentials occur in several types of animal cells, called excitable cells, which include neurons, muscle cells, and endocrine cells, as well as in some plant cells. In neurons, they play a central role in cell-to-cell communication. In other types of cells, their main function is to activate intracellular processes. In muscle cells, for example, an action potential is the first step in the chain of events leading to contraction. In beta cells of the pancreas, they provoke release of insulin. Action potentials in neurons are also known as "nerve impulses" or "spikes", and the temporal sequence of action potentials generated by a neuron is called its "spike train". A neuron that emits an action potential is often said to "fire".
- also known as 动作电位
Printed dictionaries and other books with definitions for Action potential
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by Stefan Offermanns
Table 1 Classification of antiarrhythmic drugs according to Vaughan-Williams Block of repolarizing potassium channels, prolongation of action potential Antiarrhythmic Drugs. Figure 1 Transmembrane ionic currents of the ...
Electrochemical Dictionary (2012)
by Allen J. Bard, György Inzelt, Fritz Scholz
The action potential is triggered by an initial depolarization to a threshold potential, usually about 15 mV above the resting potential of the cell. An action potential involves a depolarization, a repolarization, and finally a hyperpolarization ...
by Robert Jean Campbell
action potential Action current (q.v.); the basic unit of information ...
by David L. Hayes, MD, Samuel J. Asirvatham, MD
action potential. A sudden transient change in activated state. One of the three states of an ion channel. According to the modulated ...
by Dipak Basu
action potential A membrane electric potential exists between the exterior and the interior of a living cell; usually of value 50 mV to 100 mV, with the zero potential reference in the outside medium ...
by W. Edward Craighead, Charles B. Nemeroff
The action potential is initiated either as the consequence of summation of local electronic potentials in the region where the axon arises from the neuron cell body (axon hillock), or as a result of a sufficiently large generator potential in the ...
by Poly Mary
A muscle action potential travels over the sarcolemma and enters the transverse tubules and affects the sarcoplasmic reticulum causing it to release Ca:* into the sarcoplasm. 2. The muscle action potential leads to the release of calcium ions ...
Consequently, once the membrane has depolarized to approximately the threshold for triggering an action potential, the conductance of the inward rectifier potassium channel decreases and little potassium exits the cell during the rising phase ...
Glossary Action potential – Also known as a nerve impulse, spike, or firing, it is a change in neuronal membrane potential that is propagated down the length of the axon. Membrane potential refers to the difference in electrical charge across ...
Online dictionaries and encyclopedias with entries for Action potential
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Video language resources about Action potential
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- Best Action Potential explanation
Action potential and graded potentials explained. It is always easier to understand it if you know what a Resting membrane potential is.
- Action Potential Explanation
Explanation of how a nerve impulse occurs.
- Neurotransmitters and action potential explanation
Yr 13 Biology students make a script for the following video from a DVD that comes with the illustrated medical atlas, The Human Brain, DK Publishing UK.
- Action potential Meaning
Video shows what action potential means. A short term change in the electrical potential that travels along a cell such as a nerve or muscle fiber.. Action potential ...
- Nerve Cell and Action Potential Explanation
- Neuron action potential description
This video describes the action potential of neurons.
- 02 Neuron membrane potentials 05 Neuron action potential description
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