Understanding Second Messenger Systems Practice Test

The GPCR become inactivated

The GPCR opens to permit an influx of sodium ions (Na+)

The GPCR undergoes a conformational change, making a binding site available for a G-protein within the cytosol

The GPCR remains unchanged, as no covalent modifications have been made

The GPCR is released from the membrane and enters the intracellular space to trigger downstream signaling cascades