What are some examples of membrane receptors?
Three general categories of cell-surface receptors include: ion-channel, G-protein , and enzyme-linked protein receptors .
Ion channel-linked receptors bind a ligand and open a channel through the membrane that allows specific ions to pass through.
G-protein-linked receptors bind a ligand and activate a membrane protein called a G-protein, which then interacts with either an ion channel or an enzyme in the membrane.
Enzyme-linked receptors are cell-surface receptors with intracellular domains that are associated with an enzyme.