The rapid change in membrane potential that occurs when a ligand binds to an ionotropic receptor is caused by which of the following?
A)the large ion gradient across the membrane
B)the G protein amplification that causes the rapid channel response
C)the presence of that protein functioning as both an ionotropic receptor and as the ion channel
D)the rapid gating of the ion channel by G protein
E)the rapid G protein response that indirectly links receptor to channel

Question

Quizplus · Accepted Answer

Ionotropic receptors are ligand-gated ion channels, meaning the receptor itself is an ion channel that opens rapidly upon ligand binding, allowing ions to flow across the membrane and change the membrane potential.

The Rapid Change in Membrane Potential That Occurs When a Ligand