A _______________ binds to the same site as a neurotransmitter,prevents a neurotransmitter from binding to the receptor,and fails to activate the receptor.
A) competitive antagonist
B) noncompetitive antagonist
C) partial agonist
D) negative modulator

Question

Quizplus · Accepted Answer

A competitive antagonist binds to the same binding site as the neurotransmitter and competes with it for the receptor. By doing so, it can prevent the neurotransmitter from binding to the receptor and activating it, which results in a decrease in the effect of the neurotransmitter. In contrast, a noncompetitive antagonist binds to a different site on the receptor and inhibits its activity by changing its shape or blocking its intracellular signaling pathways. A partial agonist has both agonist and antagonist properties and can stimulate the receptor, but to a lesser extent than a full agonist. A negative modulator decreases the activity of a receptor or channel and can inhibit the binding or activity of a neurotransmitter.

A _______________ Binds to the Same Site as a Neurotransmitter,prevents