Ion channel-linked receptors

Definition

Ion channel-linked receptors are a type of cell surface receptor that opens or closes an ion channel upon binding to a signaling molecule. This allows specific ions to pass through the membrane, altering the cell's electrical state and triggering a cellular response.

5 Must Know Facts For Your Next Test

1. Ion channel-linked receptors are also known as ligand-gated ion channels.
2. They play crucial roles in nerve impulse transmission and muscle contraction.
3. These receptors respond quickly to signals, typically within milliseconds.
4. Common ions that pass through these channels include Na+, K+, Ca2+, and Cl-.
5. Malfunction of these receptors can lead to neurological disorders such as epilepsy.

Review Questions

Related terms

G-protein coupled receptor (GPCR): A type of receptor that activates G-proteins upon ligand binding, initiating a cascade of intracellular events.

Enzyme-linked receptor: A receptor that activates an enzymatic activity inside the cell when a ligand binds to it.

Ligand: A molecule that binds specifically to another molecule, usually a larger one, such as a receptor protein.