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Is a sodium channel that is opened by acetylcholine considered to be voltage-gated?
Yes, a sodium channel that is opened by acetylcholine is not considered to be voltage-gated.
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 are membrane proteins that create a passageway across cell membrane?
These are called channel proteins, which facilitate the passage of specific ions or molecules across the cell membrane. They can be gated or non-gated, and their structure is such that they form a tunnel through which substances can move in or out of the cell.
What type of channel on the postsynaptic membrane binds neurotransmitter?
a chemically gated channel
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.
What is a gated channel?
A gated channel is a protein channel in a cell membrane that can open or close to allow specific ions, like sodium or potassium, to pass through. The opening and closing of these channels are controlled by certain signals, like changes in voltage or the binding of specific molecules, in order to regulate the flow of ions into and out of the cell.
How can a gated channel protein be opened to allow the passage of molecules?
A gated channel protein can be opened by specific signals or changes in the cell environment, such as binding of a molecule or changes in voltage. This triggers the channel to change its shape, allowing molecules to pass through.
When a voltage-gated Na channel opens, what specific physiological process is initiated within the cell?
When a voltage-gated Na channel opens, it initiates the process of depolarization in the cell, leading to the generation of an action potential.
A “ligand-gated” ion channel is one that will open in response to:?
A specific molecule binding to it
What does a gated channel in a cell membrane allow?
A gated channel in a cell membrane allows for the selective passage of specific ions or molecules into or out of the cell. This regulation is important for maintaining proper cell function and controlling the cellular environment. Gated channels can open or close in response to various stimuli, such as voltage changes or chemical signals.
What is the difference between ligand-gated and voltage-gated channels in terms of their mechanisms of activation and regulation?
Ligand-gated channels are activated by binding of specific molecules (ligands) to the channel, while voltage-gated channels are activated by changes in the electrical potential across the cell membrane. Ligand-gated channels are regulated by the presence of ligands, while voltage-gated channels are regulated by changes in membrane potential.
How do ligand-gated channels differ from voltage-gated channels in terms of their mechanisms of activation and regulation?
Ligand-gated channels are activated by binding of specific molecules (ligands) to the channel, while voltage-gated channels are activated by changes in the electrical potential across the cell membrane. Ligand-gated channels are regulated by the presence of ligands, while voltage-gated channels are regulated by changes in membrane potential.
