Cell Communication and Receptors Quiz

Ion Channels and Receptors

• Ion channel receptors allow a flow of ions across the plasma membrane, changing the membrane potential and producing an electrical current.
• Ion channel receptors are responsible for generating electrical signals in neurons.

G-Protein-Coupled Receptors

• G-protein–coupled receptors activate G-proteins in the plasma membrane, initiating a cascade of effects.
• G-protein–coupled receptors trigger a series of signaling events that ultimately lead to a response.

Enzyme-Coupled Receptors

• Enzyme-coupled receptors act as or associate with enzymes when stimulated.
• Enzyme-coupled receptors display their ligand-binding domains on the surface of transmembrane proteins.

Ligands and Receptors

• A ligand is defined as a molecule that binds to a receptor, triggering a response.
• Ligands are molecules that bind to receptors, initiating a biological response.

Transmembrane Proteins

• Enzyme-coupled receptors display their ligand-binding domains on transmembrane proteins.
• Transmembrane proteins are proteins that span the plasma membrane, allowing for interaction between the extracellular and intracellular environments.