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Related Concept Videos

Propagation of Action Potentials01:23

Propagation of Action Potentials

12.3K
The propagation of an action potential refers to the process by which a nerve impulse, or "action potential," travels along a neuron.
Neurons (nerve cells) have a resting membrane potential, with a slightly negative charge inside compared to outside. This is maintained by ion channels, such as sodium (Na+) and potassium (K+) channels, which control the flow of ions. When a stimulus, like a touch or a signal from another neuron, triggers the neuron, sodium channels open, allowing sodium ions to...
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Action Potentials01:41

Action Potentials

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Overview
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Action Potential: Phases of Stimulation01:28

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The action potential is a complex electrical event that occurs in excitable cells, such as neurons and muscle cells. It consists of several distinct phases, each with specific characteristics.
Resting Phase:
In this phase, the cell's membrane is at its resting potential, typically around -70 millivolts (mV) for neurons. Inside the cell, there is a higher concentration of potassium ions (K+) and a lower concentration of sodium ions (Na+). Voltage-gated sodium channels are closed, and...
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Action Potential01:31

Action Potential

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Neurons communicate by firing action potentials—the electrochemical signal that is propagated along the axon. The signal results in the release of neurotransmitters at axon terminals, thereby transmitting information to the nervous system. An action potential is a specific "all-or-none" change in membrane potential that results in a rapid spike in voltage.
Membrane potential in neurons
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Action Potential01:14

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Neurons communicate by firing action potentials—the electrochemical signal that is propagated along the axon. The signal results in the release of neurotransmitters at axon terminals, thereby transmitting information to the nervous system. An action potential is a specific "all-or-none" change in membrane potential that results in a rapid spike in voltage.
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Electrochemical Gradient and Channel Proteins: An Overview01:21

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An electrochemical gradient is a fundamental concept in biology and chemistry. It regulates the movement of ions across cell membranes. This movement is influenced by two factors:
The electrical gradient: The electrical gradient across cell membranes refers to the difference in electric charge between the inside and outside of a cell.  This difference drives the movement of ions towards or away from the cells. For instance, if the inside of the cell is more negatively charged relative to...
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Related Experiment Video

Updated: Mar 16, 2026

Use of In Vivo Single-fiber Recording and Intact Dorsal Root Ganglion with Attached Sciatic Nerve to Examine the Mechanism of Conduction Failure
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Proton Hopping as the Nerve Conduction Message.

Lemont B Kier1

  • 1Institute of Structural Biology and Drug Discovery, Virginia Commonwealth University, Richmond, Virginia, USA. lbkier@vcu.edu.

Current Computer-Aided Drug Design
|August 10, 2016
PubMed
Summary
This summary is machine-generated.

Nerve signals travel via proton hopping, the fastest chemical reaction known. This mechanism explains how information is rapidly passed along nerve structures, detailing the complete function of nerve messaging.

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Area of Science:

  • Neuroscience
  • Biophysics
  • Biochemistry

Background:

  • Proposes a novel concept for nerve signal transmission.
  • Highlights proton hopping as the core mechanism.
  • Connects nerve function to the fastest known chemical reaction.

Purpose of the Study:

  • To elucidate the role of proton hopping in nerve conduction.
  • To provide a comprehensive understanding of nerve messaging.

Main Methods:

  • Detailed description of various nerve system components.
  • Analysis of proton hopping within these structures.

Main Results:

  • Summarizes proton hopping's involvement across nerve structures.
  • Presents a holistic view of nerve function.
  • Emphasizes proton hopping's role in information transfer.

Conclusions:

  • Defines nerve function through the lens of proton hopping.
  • Establishes proton hopping as the primary mechanism for neural message passage.