It can lead to a decrease in calcium levels in the cell

It responds to changes in voltage across the membrane

It responds to insulin

It is only found in the central nervous system

Alpha subunit

Beta subunit

Gamma subunit

All of these answers

None of these answers

It can lead to a decrease in calcium levels in the cell

It responds to changes in voltage across the membrane

It responds to insulin

It is only found in the central nervous system

Alpha subunit

Beta subunit

Gamma subunit

All of these answers

None of these answers

The alpha subunit of a G protein has an intrinsic GTPase, which converts GTP back to GDP

A GTPase enzyme comes in contact with the G protein, which converts GTP back to GDP

The beta subunit of a G protein has an intrinsic GTPase, which converts GTP back to GDP

The gamma subunit of a G protein has an intrinsic GTPase, which converts GTP back to GDP

GTP dissociates completely from the G protein reverting it back to its inactive state

The alpha subunit of a G protein has an intrinsic GTPase, which converts GTP back to GDP

A GTPase enzyme comes in contact with the G protein, which converts GTP back to GDP

The beta subunit of a G protein has an intrinsic GTPase, which converts GTP back to GDP

The gamma subunit of a G protein has an intrinsic GTPase, which converts GTP back to GDP

GTP dissociates completely from the G protein reverting it back to its inactive state

G-protein coupled receptors contain nine transmembrane alpha helices.

A Cys-S linked palmitoyl group faces the extracellular region.

G protein-coupled receptors may be desensitized by serine phosphorylation.

When GTP binds to the alpha subunit of the G protein, the beta-gamma subunit dissociates from the alpha subunit.

adenylate cyclase . . . cAMP

phospholipase C . . . protein kinase c

the sodium-potassium pump . . . membrane potential

voltage gated channels . . . muscle contraction

The decrease in cAMP

The activation of adenylyl cyclase

Downstream activation of PKA

Adenyl cyclase hydrolysis of ATP

An inactivated alpha subunit of the G protein

G-protein coupled receptors contain nine transmembrane alpha helices.

A Cys-S linked palmitoyl group faces the extracellular region.

G protein-coupled receptors may be desensitized by serine phosphorylation.

When GTP binds to the alpha subunit of the G protein, the beta-gamma subunit dissociates from the alpha subunit.