The answer is "a noradrenaline receptor".

Here's why:

Ligand-gated ion channels, also known as ionotropic receptors, are a group of transmembrane ion channels that open or close in response to the binding of a chemical messenger (i.e., a ligand), such as a neurotransmitter.

The nicotinic acetylcholine receptor, GABA-A receptor, glycine receptor, and AMPA receptor are all examples of ligand-gated ion channels. They open in response to the binding of a specific ligand: acetylcholine for the nicotinic acetylcholine receptor, GABA for the GABA-A receptor, glycine for the glycine receptor, and glutamate for the AMPA receptor.

On the other hand, the noradrenaline receptor, also known as the adrenergic receptor, is a type of G-protein coupled receptor (GPCR), not a ligand-gated ion channel. GPCRs are a different type of transmembrane receptor that activate an internal signal transduction pathway in response to the binding of a ligand, rather than directly controlling an ion channel.

Question

The answer is "a noradrenaline receptor".

Here's why:

Ligand-gated ion channels, also known as ionotropic receptors, are a group of transmembrane ion channels that open or close in response to the binding of a chemical messenger (i.e., a ligand), such as a neurotransmitter.

The nicotinic acetylcholine receptor, GABA-A receptor, glycine receptor, and AMPA receptor are all examples of ligand-gated ion channels. They open in response to the binding of a specific ligand: acetylcholine for the nicotinic acetylcholine receptor, GABA for the GABA-A receptor, glycine for the glycine receptor, and glutamate for the AMPA receptor.

On the other hand, the noradrenaline receptor, also known as the adrenergic receptor, is a type of G-protein coupled receptor (GPCR), not a ligand-gated ion channel. GPCRs are a different type of transmembrane receptor that activate an internal signal transduction pathway in response to the binding of a ligand, rather than directly controlling an ion channel.

Knowee AI · Accepted Answer

The answer is "a noradrenaline receptor".

Here's why:

Ligand-gated ion channels, also known as ionotropic receptors, are a group of transmembrane ion channels that open or close in response to the binding of a chemical messenger (i.e., a ligand), such as a neurotransmitter.

The nicotinic acetylcholine receptor, GABA-A receptor, glycine receptor, and AMPA receptor are all examples of ligand-gated ion channels. They open in response to the binding of a specific ligand: acetylcholine for the nicotinic acetylcholine receptor, GABA for the GABA-A receptor, glycine for the glycine receptor, and glutamate for the AMPA receptor.

On the other hand, the noradrenaline receptor, also known as the adrenergic receptor, is a type of G-protein coupled receptor (GPCR), not a ligand-gated ion channel. GPCRs are a different type of transmembrane receptor that activate an internal signal transduction pathway in response to the binding of a ligand, rather than directly controlling an ion channel.

Which of the following is NOT a ligand-gated ion channel?Group of answer choicesa nicotinic acetylcholine receptora GABA-A receptora glycine receptora noradrenaline receptoran AMPA receptor

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