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What is a gated channel?
It is a channel through a membrane that can be opened or closed by chemical or electrical events.
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.
What is ligand gated ion channel?
Ionotropic receptors are ligand-gated or transmitter gated ion channels. The binding of a neurotransmitter or other ligand to a particular site on a domain of a protein in the receptor causes a conformational change in the protein subunits. This allows a certain ion to pass through, poteitally potassium, sodium or chloride. There are two types of ionotropic receptors, non-NMDA and NMDA. Both are ligand gated receptors, however the NMDA is also voltage gated.
