A positive allosteric modulator:
A) prevents neurotransmission.
B) facilitates the effects of a neurotransmitter at receptors.
C) can activate receptors.
D) has a weak binding affinity for receptors.

Question

Quizplus · Accepted Answer

A positive allosteric modulator increases the activity of a receptor by binding to an allosteric site on the receptor, which enhances the receptor's sensitivity to the neurotransmitter. This facilitates the effects of the neurotransmitter and can lead to increased neurotransmission. It does not prevent neurotransmission or directly activate the receptor, and it can have a high binding affinity for the receptor. Therefore, option B is the correct answer.

A Positive Allosteric Modulator