Match each item with a description or definition. Integral membrane protein that binds a ligand to its exterior surface, A engendering a conformational change that gives rise to changes on the inside of the cell that are transduced through a heterotrimeric peripheral protein. * LUipid-anchored membrane protein * Active transporter : G-protein coupled receptor R Protein that functions in an aqueous environment but is attached to a *membrane via a lipidic connector like palmitate. Protein that allows passage of an ion or compound through a membrane if C. and only the electrostatic potential difference between the two sides of the * Ligand-gated ion channel membrane is above or below some cutoff. n Protein that functions in an aqueous environment but is attached to a membrane via a hydrophilic connector. Extrinsic protein : Voltage-gated ion channel Protein that allows passage of an lon through a membrane if and only if a "specific small molecule binds to the protein. Protein that enables passage of a molecule against its concentration F. gradient by coupling that transport to an energy source.