Heroin Causes Similar,but Much Stronger Effects to the Nervous System

Multiple Choice

Heroin causes similar,but much stronger effects to the nervous system as endogenous opioids.Heroin's mechanism of action might be that it acts as an:

A) agonist to serotonin receptors.
B) agonist to the endogenous opioid receptors.
C) agonist to glycine receptors.
D) agonist to epinephrine receptors.
E) Any of these are possible