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Ligand gated ion channels

Ligand gated ion channel

a transmembrane ion channel whose permeability is increased by the binding of a specific ligand, typically a neurotransmitter at a chemical synapse. The permeability change is often drastic, such channels let through effectively no ions when shut, but allow passage at up to 10exp7 ions sexp 1 when a ligand is bound. Recently, the receptors for both acetylcholine and gaba have been found to share considerable sequence homology, implying that there may be a family of structurally related ligand gated ion channels.


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Simple Diffusion`

Movement of O2 is not simple diffusion? so what is it? The movement is ... Ionotropic receptors are ligand-gated ion channels that open or close through neurotransmitter ...

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by Poison
Fri Apr 21, 2006 11:09 pm
 
Forum: Cell Biology
Topic: Simple Diffusion`
Replies: 7
Views: 15967

nervous system

... and then propagating action potentials. Once stimulated and ... an action potential is propagated through the depolarization of ... of sodium and potassium specific ligand gated ion channels on the plasma membrane of the ...

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by nabizko
Thu Nov 24, 2005 9:01 am
 
Forum: Human Biology
Topic: nervous system
Replies: 6
Views: 3235

cellular signalling

... something up on the activation of genes by extra-cellular signalling ... what about G-protein receptors or ligand ion gated channels? these aswell?

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by lollipop29
Sat Sep 03, 2005 4:47 am
 
Forum: Cell Biology
Topic: The Living Cell
Replies: 7
Views: 5934


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