Down-regulation of a neuron's receptors might be caused by
A) the antagonistic effects of a drug.
B) the agonistic effects of a drug.
C) a drug that both inhibits and excites the nervous system.
D) two similar drugs exerting opposite effects.

Question

Quizplus · Accepted Answer

Down-regulation of a neuron's receptors often occurs in response to prolonged exposure to an agonist. This is because the continuous activation of receptors by an agonist can lead to the neuron reducing the number of receptors available, in an attempt to diminish the overstimulation and maintain homeostasis.

Down-Regulation of a Neuron's Receptors Might Be Caused by