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It is a channel through a membrane that can be opened or closed by chemical or electrical events.
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoThere are voltage-gated ion channels and ligand-gated ion channels, and since both are stimuli the term stimulus-gated is a redundancy.
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Type of membrane channel that opens when distorted?
Mechanically-gated
What type of ion channels does an actions potential in the axon terminal of a motor neuron open?
voltage-gated calcium ion channel
Why are G-protein-gated ion channels called the shortcut pathway?
All action of neurotransmitter is eventually (mostly) manifest in the regulation of ion in nerve cell, to decide when to fire or not an action potential. Regulation of ion utilize the ion channel, and there are three (known) mechanism which affect the opening and closing of an ion channel : 1) direct influence - ion channel which is directly activated by neurotransmitter attached to them, this one is called ¨Transmitter Gated Channel¨ 2) shortcut pathways - ion channel which is activated by G-protein, this is called the ¨G-protein-gated ion channels¨ 3) second messenger cascades - G-protein trigger a chain reaction of chemical through enzyme or other class of protein and finally affect the opening and closing of ion channels
Which type of membrane channels are found at the axon?
Voltage-gated Na+ and voltage-gated K+ channels
How does graded potential occur?
Graded potential occurs when triggered by a stimulus and gated ion channels open these gated channels can either be chemically gated or mechanically gated. In order to have graded potential threshold must be met in order to generate action potential. Good day!
What is a stimulus gated channel?
There are voltage-gated ion channels and ligand-gated ion channels, and since both are stimuli the term stimulus-gated is a redundancy.
What type of channel on the postsynaptic membrane binds neurotransmitter?
a chemically gated channel
What can be opened or closed in a cell membrane?
Gated Ion Channel. Not sure about the answer
What does a gated channel in a cell membrane allow?
osmosis
What does an agonist for a ligand-gated ion channel typically do?
Agonists tend to work in favor of something, therefore an agonist for a ligand-gated ion channel would open the channel whereas an antagonist would prevent it from opening.
Type of membrane channel that opens when distorted?
Mechanically-gated
What is a gated protein?
Its channel protein with flaps at the ends that act as gates
A “ligand-gated” ion channel is one that will open in response to:?
A specific molecule binding to it
Which ion channel opens in response to a change in membrane potential and participates in the generation and conduction of action potentials?
Sodium channels. A neuron's membrane potential may depolarize for many reasons (neurotransmitters, mechanical deflection, electrical synapse, etc). When that membrane depolarizes to the point of its threshold of activation, then voltage gated channels open up an allow an influx of sodium into the cell. This rapidly depolarizes the cell's membrane, causing that upward peak or rising phase to occur.
Are gated channels are always open?
Yes, it can a gated ion channel is opened when a signal molecule binds to a receptor protein causing the receptor protein to open the ion channel through the cell membrane and after this process the ion channel is closed once again to prevent various molecules to enter the cell.
The chemically gated channel known as NMDA allows what ions entry into the nerve cell?
Na+
Are gated channel in the wall membrane of a cell may be opened or shut like a gate in a fence?
true
