At metabotropic receptors, a(n)
A) neurotransmitter binding to a receptor stimulates a G -protein, which then activates a second messenger through one or more enzymatic actions.
B) neurotransmitter binding to a receptor opens or closes channels that are part of the same protein as the receptor.
C) neurotransmitter binding to a receptor opens channels that are a separate protein from the receptor.
D) ion binding to a receptor opens channels in the plasma membrane.
E) neurotransmitter binding to a receptor opens or closes channels that are a separate protein from the receptor.

Question

Quizplus · Accepted Answer

Metabotropic receptors work through a process where a neurotransmitter binds to the receptor, activating a G-protein, which in turn activates a second messenger system through enzymatic actions. This is different from ionotropic receptors, where the neurotransmitter binding directly opens or closes ion channels.

At Metabotropic Receptors, A(n)