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End-plate potential
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High Quality Content by WIKIPEDIA articles! End plate potentials (EPPs) (sometimes called "end plate spikes") are the depolarizations of skeletal muscle fibers caused by neurotransmitters binding to the postsynaptic membrane in the neuromuscular junction. They are called "end plates" because the postsynaptic terminals of muscle fibers have a large, saucer-like appearance. When an action potential reaches the axon terminal of a motor neuron, vesicles carrying neurotransmitters (mostly acetylcholine) are exocytosed and the contents are released into the neuromuscular junction. These neurotransmitters bind to receptors on the postsynaptic membrane and lead to its depolarization. In the absence of an action potential, acetylcholine vesicles spontaneously leak into the neuromuscular junction and cause very small depolarizations in the postsynaptic membrane. This small response (~0.5mV) is called a miniature end plate potential (MEPP) and is generated by one acetylcholine containing vesicle. It represents the smallest possible depolarization which can be induced in a muscle.
Weitere Informationen
- Allgemeine Informationen
- GTIN 09786131637056
- Editor Frederic P. Miller, Agnes F. Vandome, John McBrewster
- Größe H220mm x B220mm
- EAN 9786131637056
- Format Kartonierter Einband
- Titel End-plate potential
- Herausgeber Alphascript Publishing
- Anzahl Seiten 152
- Genre Biologie
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