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Related Concept Videos

The Role of Ion Channels in Neuronal Computation01:19

The Role of Ion Channels in Neuronal Computation

A postsynaptic neuron usually receives numerous impulses from several other presynaptic neurons. The axon hillock of the postsynaptic neuron integrates all these signals and determines the likelihood of firing an action potential.
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential.
Voltage-gated Ion Channels01:26

Voltage-gated Ion Channels

Voltage-gated ion channels are transmembrane proteins that open and close in response to changes in the membrane potential. They are present on the membranes of all electrically excitable cells such as neurons, heart, and muscle cells.
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several types of...
Voltage-gated Ion Channels01:26

Voltage-gated Ion Channels

Voltage-gated ion channels are transmembrane proteins that open and close in response to changes in the membrane potential. They are present on the membranes of all electrically excitable cells such as neurons, heart, and muscle cells.
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several types of...
Non-gated Ion Channels01:24

Non-gated Ion Channels

Ion channels are specialized proteins on the plasma membrane that allow charged ions to pass down their electrochemical gradient. Their main function is to maintain the membrane potential which is critical for cell viability. These channels are either gated or non-gated and can transport more than a thousand ions within milliseconds for the cellular event to occur.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism.
Non-gated Ion Channels01:24

Non-gated Ion Channels

Ion channels are specialized proteins on the plasma membrane that allow charged ions to pass down their electrochemical gradient. Their main function is to maintain the membrane potential which is critical for cell viability. These channels are either gated or non-gated and can transport more than a thousand ions within milliseconds for the cellular event to occur.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism.
Mechanically-gated Ion Channels01:12

Mechanically-gated Ion Channels

Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...

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Updated: May 29, 2026

Patch Clamp and Perfusion Techniques for Studying Ion Channels Expressed in Xenopus oocytes
10:19

Patch Clamp and Perfusion Techniques for Studying Ion Channels Expressed in Xenopus oocytes

Published on: January 10, 2011

Small-conductance Ca2+-activated K+ channels: form and function.

John P Adelman1, James Maylie, Pankaj Sah

  • 1Vollum Institute, Oregon Health & Science University, Portland, Oregon 97239, USA. adelman@ohsu.edu

Annual Review of Physiology
|September 28, 2011
PubMed
Summary
This summary is machine-generated.

Small-conductance Ca(2+)-activated K(+) channels (SK channels) regulate neuronal excitability and synaptic plasticity. This review covers their molecular properties and physiological roles in the central nervous system.

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Related Experiment Videos

Last Updated: May 29, 2026

Patch Clamp and Perfusion Techniques for Studying Ion Channels Expressed in Xenopus oocytes
10:19

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Published on: January 10, 2011

Recapitulation of an Ion Channel IV Curve Using Frequency Components
10:14

Recapitulation of an Ion Channel IV Curve Using Frequency Components

Published on: February 8, 2011

Determination of the Relative Cell Surface and Total Expression of Recombinant Ion Channels Using Flow Cytometry
11:32

Determination of the Relative Cell Surface and Total Expression of Recombinant Ion Channels Using Flow Cytometry

Published on: September 28, 2016

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Ion Channel Physiology

Background:

  • Small-conductance Ca(2+)-activated K(+) channels (SK channels) are crucial for neuronal function.
  • They are activated by intracellular Ca(2+) and form complexes with calmodulin, CK2, and PP2A.
  • SK channels are implicated in regulating neuronal excitability and synaptic plasticity.

Purpose of the Study:

  • To review the molecular and functional properties of SK channels.
  • To discuss the physiological roles of SK channels in central neurons.

Main Methods:

  • Literature review of studies on SK channel structure, function, and physiology.
  • Analysis of existing data on SK channel involvement in neuronal excitability and synaptic plasticity.

Main Results:

  • SK channels are widely expressed in the central nervous system.
  • They play key roles in regulating somatic excitability.
  • SK channel activity at glutamatergic synapses impacts synaptic transmission, plasticity, learning, and memory.

Conclusions:

  • SK channels are integral to central nervous system function.
  • Their modulation of synaptic plasticity is critical for learning and memory.
  • Further research into SK channel mechanisms and roles is warranted.